U.S. PATENT AND TRADEMARK OFFICE
Information Products Division
[Manual of Classification, Class Listing] [Manual of Classification, Class 570] [Classification Definitions, Class Listing] [USPTO Home Page]

U.S. Patent Classification System - Classification Definitions
as of June 30, 2000

[Explanation of Data]

Patents classified in a subclass may be accessed by either clicking on the subclass number
preceding each subclass definition or on the " [Patents] " icon, below.
( please note that patents for some subclasses may not be available )

For classification search strategies, please refer to the Classification Index Explanation of Data web page.

(definitions have been obtained from the Patents ASSIST CD-ROM which is produced by the U.S. Patent and Trademark Office Electronic Products Branch)


Class 570

ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES


Class Definition:

SUBCLASSES


Subclass: 101 [Patents]

HALOGEN CONTAINING:
This subclass is indented under subclass 1. Compound under Class 532, ... which contain an atom of halogen.
(1) Note. Due to hierarchical position of this subclass, compounds hereunder contain only carbon and halogen, or carbon hydrogen and halogen.
(2) Note. The patents found in this particular subclass relate primarily to processes of preparing saturated halogen containing compounds not specifically provided for below.

SEE OR SEARCH CLASS:
204, Chemistry: Electrical and Wave Energy, 157.15 for chemical preparation of a compound which contains carbon and halogen or carbon, hydrogen, and halogen by utilizing wave energy; and subclass 169 for chemical preparation of a compound which contains carbon and halogen or carbon, hydrogen, and halogen by utilizing an electrostatic field or electrical discharge.
588, Hazardous or Toxic Waste Destruction or Containment, subclasses 206-225 and 255 for the destruction or containment of organic hazardous or toxic waste containing halogen, sulfur, oxygen, nitrogen, or metals.

Subclass: 102 [Patents]

With preservative or stabilizer:
This subclass is indented under subclass 101. Halogen containing compound containing an additional ingredient intended to prevent or decrease chemical or physical change of the compound.
(1) Note. A preserved compound claimed as having a utility provided for in the composition classes is classified with the composition.However, a mere recital of the destabilizing effect or medium guarded against, e.g., "in contact with aluminum", etc., will not prevent placement of a patent in this or indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:
177 211, 238+, or 262+, for a process of increasing the stability of the appropriate compound by purification.
264 for a process of treating a compound of this class to increase stability which does not involve purification or the use of an added agent which remains as part of the composition.

SEE OR SEARCH CLASS:
134, Cleaning and Liquid Contact With Solids, for a process of cleaning using a halogenated solvent, particularly subclass 31 for vapor degreasing.
252, Compositions, subclass 364 for solvents generally which contain halogen containing compounds; subclasses 397+ for compositions which inhibit physical or chemical change, per se; and subclass 68 for refrigerants which contain halogen containing compounds.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, 41 for manipulative ongoing methods of storage or protections of a liquid, particularly subclass 42 for preventing evaporation.
510, Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions, 201, 245+, and 405 for solvent-type cleaning compositions which may include halogen-containing compounds, particularly subclasses 204+, 254+, 273, and 412, as well as other appropriate subclasses.

Subclass: 103 [Patents]

To prevent or reduce polymerization:
This subclass is indented under subclass 102. Compositions wherein the stabilizer or preservative prevents the halogen containing compound from reacting with itself to produce a
high molecular weight, usually solid product.
(1) Note. There must be a positive disclosure or claim that polymerization is being prevented or reduced. In cases of doubt, the patent will be placed below and cross-referenced to this or indented subclasses if desired.

Subclass: 104 [Patents]

Nitrogen bonded directly to oxygen in preservative or stabilizer:
This subclass is indented under subclass 103. Composition wherein the preservative or stabilizer contains an atom of nitrogen bonded directly to oxygen, e.g., nitro, nitros, amine oxide, or oxime, etc.

Subclass: 105 [Patents]

Oxygen single bonded directly to benzene ring in preservative or stabilizer:
This subclass is indented under subclass 103. Composition wherein the preservative or stabilizer contains an atom of oxygen bonded directly to a benzene ring, e.g., phenols, phenol ether, etc.

Subclass: 106 [Patents]

Sulfur containing preservative or stabilizer:
This subclass is indented under subclass 103. Composition wherein the preservative or stabilizer contains sulfur.

Subclass: 107 [Patents]

Acetylenic unsaturation containing preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains a carbon to carbon triple bond.

Subclass: 108 [Patents]

Hydroxy, bonded directly to carbon, or ether containing:
This subclass is indented under subclass 107. Composition wherein the preservative or stabilizer also contains a hydroxy group bonded directly to carbon or an ether group in addition to a carbon to carbon triple bond, e.g., acetylenic alcohol, etc.

Subclass: 109 [Patents]

Nitrogen containing hetero ring in preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains a ring having three or more members and containing at least one atom of each of carbon and nitrogen and optionally oxygen, sulfur, selenium, or tellurium as the only other ring members.

Subclass: 110 [Patents]

Acyclic nitro containing preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains a nitro group bonded directly to a carbon atom which is not part of a ring.

Subclass: 111 [Patents]

Nitrogen, other than as ammonia or the ammonium ion in preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains nitrogen in a form other than ammonia, per se, or ammonium ion, e.g., amines.

Subclass: 112 [Patents]

Nitrile:
This subclass is indented under subclass 111. Composition wherein the preservative or stabilizer contains nitrogen triply bonded to carbon.

Subclass: 113 [Patents]

Imine (e.g., hydrazone, oxime, etc.):
This subclass is indented under subclass 111. Composition wherein the preservative or stabilizer contains nitrogen doubly bonded to carbon.

Subclass: 114 [Patents]

Oxygen containing hetero ring in preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains a ring having three or more members and containing at least one atom each of carbon and oxygen and optionally sulfur, selenuim, or tellurium as the only other ring members.

Subclass: 115 [Patents]

Hetero ring containing plural ring oxygens:
This subclass is indented under subclass 114. Composition wherein the ring contained in the preservative or stabilizer contains two or more atoms of oxygen.

Subclass: 116 [Patents]

Oxirane ring:
This subclass is indented under subclass 114. Composition wherein the ring contained in the preservative or stabilizer contains only three atoms, two of which are carbon and one of which is oxygen.

Subclass: 117 [Patents]

Carbonyl containing preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains carbon doubly bonded to oxygen.

Subclass: 118 [Patents]

Hydroxy, bonded to carbon, or ether containing preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains hydroxy
bonded directly to carbon or an oxygen atom bonded directly to two carbon atoms by single bonds.

Subclass: 119 [Patents]

Phenolic:
This subclass is indented under subclass 118. Composition wherein a carbon atom bonded to the hydroxy or ether oxygen is part of a benzene ring.

Subclass: 120 [Patents]

Sulfur containing preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the preservative or stabilizer contains sulfur.
(1) Note. The sulfur may be in any form including organic and inorganic compounds, e.g., mercaptan, sodium sulfite, etc.

Subclass: 121 [Patents]

Hydrocarbon, halocarbon or halohydrocarbon preservative or stabilizer:
This subclass is indented under subclass 102. Composition wherein the stabilizer contains carbon and hydrogen only, carbon and halogen only, or carbon hydrogen, and halogen only.

Subclass: 122 [Patents]

Acyclic carbon to carbon unsaturation containing:
This subclass is indented under subclass 121. Composition wherein the hydrocarbon, halocarbon, or halohydrocarbon preservative or stabilizer contains carbon to carbon unsaturation which is not part of a ring.

Subclass: 123 [Patents]

Fluorine containing:
This subclass is indented under subclass 101. Compound containing at least one atom of fluorine, and a process for
the manufacture or treatment of such compound not classified elsewhere.
(1) Note. This subclass primarily contains patents drawn to the production of saturated fluorine containing compounds by methods not provided for below.

Subclass: 124 [Patents]

Product:
This subclass is indented under subclass 123. Compound.
(1) Note. In order to be classified in this or indented subclasses, a patent must contain a claim to a compound classified hereunder.

Subclass: 125 [Patents]

Polymer or unsaturated monomer:
This subclass is indented under subclass 125. Compound wherein two or more unsaturated molecules are added together through the unsaturation.

SEE OR SEARCH CLASS:
526, Synthetic Resins or Natural Rubbers, subclass 249 for polymers of this type which are synthetic resins.

Subclass: 126 [Patents]

Fluorine is sole halogen:
This subclass is indented under subclass 125. Compound wherein the only halogen present is fluorine.

SEE OR SEARCH CLASS:
526, Synthetic Resins or Natural Rubbers, 250 for polymers of this type which are synthetic resins.

Subclass: 127 [Patents]

Benzene ring containing:
This subclass is indented under subclass 124. Compound which contains at least one benzene ring.

Subclass: 128 [Patents]

Acyclic unsaturation containing:
This subclass is indented under subclass 127. Compound which contain carbon to carbon unsaturation which is not part of a ring.

Subclass: 129 [Patents]

Plural carbocyclic rings containing:
This subclass is indented under subclass 127. Compound which contains at least two carbocyclic rings, at least one of which is a benzene ring.

Subclass: 130 [Patents]

Plural carbocyclic rings containing:
This subclass is indented under subclass 124. Compound which contains two or more carbocyclic rings.

SEE OR SEARCH CLASS:
552, Organic Compounds, subclass 653 for fluorinated derivatives of Vitamin D compounds, cholecalciferols, activated 7-dehyrocholesterols, dihydrotachysterols, 3-5 cyclovitamin D compounds, etc.

Subclass: 131 [Patents]

Carbocyclic ring contains six carbon atoms:
This subclass is indented under subclass 124. Compound which contains a ring consisting of six and only six carbon atoms.

Subclass: 132 [Patents]

Carbocyclic ring contains four carbon atoms:
This subclass is indented under subclass 124. Compound which contains a ring consisting of four and only four carbon atoms.

Subclass: 133 [Patents]

Carbocyclic ring contains three carbon atoms:
This subclass is indented under subclass 124. Compound which contains a ring consisting of three and only three carbon atoms.

Subclass: 134 [Patents]

Acyclic:
This subclass is indented under subclass 124. Compound which does not contain a ring.

Subclass: 135 [Patents]

Unsaturated:
This subclass is indented under subclass 134. Compound containing carbon to carbon unsaturation.

Subclass: 136 [Patents]

Fluorine is sole halogen:
This subclass is indented under subclass 135. Compound wherein the only halogen present is fluorine.

Subclass: 137 [Patents]

Bromine or iodine containing:
This subclass is indented under subclass 134. Compound which contain bromine or iodine.

Subclass: 138 [Patents]

Polymerization of unsaturated compound:
This subclass is indented under subclass 123. Process where two or more molecules of an unsaturated compound are added together to produce a larger molecule.
(1) Note. The unsaturated molecules added together may be the same (homopolymer) of different (copolymer).

Subclass: 139 [Patents]

With chain terminating agent (e.g., telogen, etc.):
This subclass is indented under subclass 138. Process wherein the polymerization is conducted in the presence of an agent which terminates the growing polymer chain.These agents are often called chain stoppers, chain transfer agents, or telogens, etc.

Subclass: 140 [Patents]

From organic compound containing an element other than carbon, hydrogen, or halogen:
This subclass is indented under subclass 123. Process wherein a fluorine containing compound is prepared in such a way that the source of at least an atom of carbon in the compound is an organic compound containing an element other than carbon, hydrogen, or halogen.

Subclass: 141 [Patents]

Nitrogen containing:
This subclass is indented under subclass 140. Process wherein the organic compound contains nitrogen.

Subclass: 142 [Patents]

Oxygen containing:
This subclass is indented under subclass 140. Process wherein the organic compound contains oxygen.

Subclass: 143 [Patents]

Preparing benzene ring containing compound:
This subclass is indented under subclass 123. Process wherein a compound containing a benzene ring is prepared.

Subclass: 144 [Patents]

Haloalkyl containing compound:
This subclass is indented under subclass 143. Process of preparing a compound containing a benzene ring having a substituent containing carbon and halogen which substituent is not part of a benzene ring.

Subclass: 145 [Patents]

By substituting halogen for a different halogen in haloalkyl group:
This subclass is indented under subclass 144. Process wherein a halogen in the haloalkyl group is exchanged for a different halogen.

Subclass: 146 [Patents]

Forming the benzene ring:
This subclass is indented under subclass 143. Process wherein a benzene ring containing compound is prepared from starting material, none of which contains a benzene ring.

Subclass: 147 [Patents]

Substituting halogen for different halogen or hydrogen:
This subclass is indented under subclass 143. Process wherein halogen is exchanged for a different halogen or hydrogen.

Subclass: 148 [Patents]

Forming alicyclic ring from benzene ring:
This subclass is indented under subclass 123. Process wherein a benzene ring is converted to an alicyclic ring.

Subclass: 149 [Patents]

Forming alicyclic ring from acyclic compound:
This subclass is indented under subclass 123. Process wherein an alicyclic ring is made from starting material, none of which contains a ring.

Subclass: 150 [Patents]

Preparing from elemental carbon, carbon oxide, or carbon disulfide:
This subclass is indented under subclass 123. Process wherein the source of at least one atom of carbon in the fluorine containing compound is elemental carbon, a carbon oxide, or carbon disulfide.

Subclass: 151 [Patents]

Isomerization:
This subclass is indented under subclass 123. Process wherein a fluorine containing compound is converted into another containing compound of differing structure but of the same empirical formula as the starting compound.

Subclass: 152 [Patents]

Decreasing molecular weight of polymer of indeterminate structure:
This subclass is indented under subclass 123. Process of decreasing the molecular weight of a polymer of indeterminate structure, e.g., cracking, etc.
(1) Note. A polymer of indeterminate structure is a substance made by adding together two or more smaller molecules and does not consist of a single, identifiable molecular species, but rather contains a variety of molecules of varying molecular weight which are only identifiable by their average properties, e.g., synthetic resins, etc.

Subclass: 153 [Patents]

Preparing unsaturated compound:
This subclass is indented under subclass 123. Process wherein a compound containing carbon to carbon unsaturated is prepared.

Subclass: 154 [Patents]

From acetylenically unsaturated compound:
This subclass is indented under subclass 153. Process
wherein a reactant contains a carbon to carbon triple bond.

Subclass: 155 [Patents]

By dehalogenation or dehydrohalogenation of adjacent carbon atoms in a compound:
This subclass is indented under subclass 153. Process wherein carbon to carbon unsaturation is obtained in a compound by the removal of hydrogen and halogen from adjacent carbon atoms.

Subclass: 156 [Patents]

Catalyst utilized:
This subclass is indented under subclass 155. Process which employs a catalyst.

Subclass: 157 [Patents]

Alkali or alkaline earth metal containing catalyst:
This subclass is indented under subclass 156. Process wherein the catalyst contains an atom of an alkali or an alkaline earth metal.

Subclass: 158 [Patents]

Zinc containing catalyst:
This subclass is indented under subclass 156. Process wherein the catalyst contains an atom of zinc.

Subclass: 159 [Patents]

From methane or halomethane:
This subclass is indented under subclass 153. Process wherein a source of carbon in the product is methane or a halomethane.

Subclass: 160 [Patents]

Substituting fluorine for a different halogen:
This subclass is indented under subclass 153. Process wherein an atom of fluorine replaces a different halogen in the compound.

Subclass: 161 [Patents]

Utilizing halogen fluoride or a mixture of elemental fluorine and another elemental halogen:
This subclass is indented under subclass 123. Process wherein a compound of fluorine and another halogen or a physical mixture of elemental fluorine with another elemental halogen is employed.

Subclass: 162 [Patents]

Utilizing a compound containing silicon and fluorine:
This subclass is indented under subclass 123. Process wherein a compound containing silicon and fluorine is employed.

Subclass: 163 [Patents]

Transhalogenation or disproportionation:
This subclass is indented under subclass 123. Process wherein halogen is transferred from one molecule of a carbon compound to another.
(1) Note. The transfer may be between unlike molecules or two molecules of the same compound.

Subclass: 164 [Patents]

By reacting with hydrogen fluoride:
This subclass is indented under subclass 123. Process wherein the source of fluorine introduced into a carbon compound is hydrogen fluoride.

Subclass: 165 [Patents]

Catalyst utilized:
This subclass is indented under subclass 164. Process
employing a catalyst.

Subclass: 166 [Patents]

Metal halide containing catalyst:
This subclass is indented under subclass 165. Process wherein the catalyst contains a compound containing a metal and halogen.

Subclass: 167 [Patents]

Antimony halide containing catalyst:
This subclass is indented under subclass 166. Process wherein the metal is antimony.

Subclass: 168 [Patents]

Transition metal halide containing catalyst:
This subclass is indented under subclass 166. Process wherein the metal is a transition metal.
(1) Note. The transition metals are elements in which an inner electron shell rather than an outer shell is partially filled.In the periodic chart they include elements 21 through 30 (scandium through zinc), 39 through 48 (yttrium through cadinum), 57 through 80 (lathanum through mercury), and 89 through 103 (actinium through lawrencium).

Subclass: 169 [Patents]

Metal oxide containing catalyst:
This subclass is indented under subclass 165. Process wherein the catalyst contains a compound which contains a metal and oxygen.

Subclass: 170 [Patents]

Substituting halogen for a different halogen:
This subclass is indented under subclass 123. Process wherein a halogen is replaced by a different halogen.

Subclass: 171 [Patents]

Increasing the number of carbons in the compound:
This subclass is indented under subclass 123. Process wherein the product compound contains more carbon atoms than any reactant.

Subclass: 172 [Patents]

Utilizing unsaturated compound:
This subclass is indented under subclass 171. Process wherein one of the reactants contains carbon to carbon unsaturation.

Subclass: 173 [Patents]

Decreasing the number of carbons in the compound (e.g., cracking, etc.):
This subclass is indented under subclass 123. Process wherein all products have less carbon atoms than any reactant.

Subclass: 174 [Patents]

Introducing bromine or iodine:
This subclass is indented under subclass 123. Process wherein bromine or iodine is introduced into a fluorine containing compound.

Subclass: 175 [Patents]

Utilizing unsaturated compound:
This subclass is indented under subclass 123. Process wherein a compound contains carbon to carbon unsaturation.

Subclass: 176 [Patents]

Replacing halogen with hydrogen:
This subclass is indented under subclass 123. Process wherein an atom of halogen is removed and replaced by
hydrogen.

Subclass: 177 [Patents]

Purification or recovery:
This subclass is indented under subclass 123. Process of purifying or recovering a fluorine containing compound.

Subclass: 178 [Patents]

Including distillation:
This subclass is indented under subclass 177. Process wherein the purification or recovery includes distillation.

SEE OR SEARCH CLASS:
203, Distillation: Processes, Separatory, for a process of distillation, per se; see the definition to that class, particularly section III, B for the lines between Class 203 and this class (570) where combined subject matter is involved.

Subclass: 179 [Patents]

Solid sorbent utilized:
This subclass is indented under subclass 177. Process wherein a solid sorbent is utilized in the process.

Subclass: 180 [Patents]

Including extraction with organic liquid:
This subclass is indented under subclass 177. Process which includes extraction with an organic liquid.

Subclass: 181 [Patents]

Product:
This subclass is indented under subclass 101. Compound.
(1) Note. In order to be classified in this or indented subclasses, a patent must contain a claim to a compound classified hereunder.

Subclass: 182 [Patents]

Benzene ring containing:
This subclass is indented under subclass 181. Compound which contains a benzene ring.

Subclass: 183 [Patents]

Polycyclo ring system:
This subclass is indented under subclass 182. Compound which contains two rings having two or more carbon atoms in common.
(1) Note. These systems are often referred to in the art as bridged (three or more atoms in common) or fused (two atoms in common).

Subclass: 184 [Patents]

Plural benzene rings bonded directly to the same acyclic carbon or attached by an acyclic carbon chain:
This subclass is indented under subclass 182. Compound which contains two or more benzene rings bonded directly to the same carbon which is not part of a ring or bonded through two or more carbons, none of which is part of a ring.

Subclass: 185 [Patents]

Benzene ring and halogen bonded directly to the same acyclic carbon chain:
This subclass is indented under subclass 182. Compound which contains a benzene ring and a halogen bonded directly to a carbon atom which is not part of a ring or a benzene ring attached to a halogen atom through a chain of two or more carbon atoms, none of which is part of a ring.

Subclass: 186 [Patents]

Alicyclic ring containing:
This subclass is indented under subclass 181. Compound which contain a ring of three or more carbon atoms, which ring is
not a benzene ring.

Subclass: 187 [Patents]

Polycyclo ring system:
This subclass is indented under subclass 186. Compound which contains a ring system of at least two rings which have tow or more carbon atoms in common.
(1) Note. These compounds are usually referred to in the art as fused (only two atoms in common) or bridged (three or more atoms in common).

SEE OR SEARCH CLASS:
552, Organic Compounds, subclass 653 for halogenated derivatives of Vitamin D compounds, cholecalciferols, activated 7-dehyrocholesterols, dihydrotachysterols, 3-5 cyclovitamin D compounds, etc.

Subclass: 188 [Patents]

Plural rings containing:
This subclass is indented under subclass 186. Compound which contains two or more alicyclic rings.

Subclass: 189 [Patents]

Alicyclic carbon to carbon unsaturation containing:
This subclass is indented under subclass 181. Compound which contains carbon to carbon unsaturation which is not part of any ring.

Subclass: 190 [Patents]

Processes of preparing, purifying, or recovering benzene ring containing compound:
This subclass is indented under subclass 101. Process wherein a benzene ring containing compound is prepared, purified, or recovered.

Subclass: 191 [Patents]

Preparing acyclic haloalkyl group containing compound:
This subclass is indented under subclass 190. Process of preparing a benzene ring containing compound which contains a halogen atom bonded indirectly to a benzene ring through one or more carbon atoms, none of which is part of a ring.

Subclass: 192 [Patents]

Halo, 1,1-diphenylethane or ring substituted Derivative thereof prepared DDT, etc.):
This subclass is indented under subclass 191. Process wherein the compound prepared has the 1,1-diphenylethane structure, (i.e., see figure below) wherein at least one hydrogen atom is replaced with halogen and in addition may have other substituents on the ring carbon atoms. [figure]

Subclass: 193 [Patents]

Having acyclic carbon to carbon unsaturation:
This subclass is indented under subclass 191. Process wherein the compound prepared contains carbon to carbon unsaturation which is not part of a ring.

Subclass: 194 [Patents]

Bonding haloalkyl group directly to benzene ring:
This subclass is indented under subclass 191. Process wherein an aliphatic carbon atom bonded directly or indirectly to halogen is bonded directly to a benzene ring, or wherein an aliphatic carbon atom is bonded directly to a benzene ring, a halogen is bonded directly or indirectly thereto.

Subclass: 195 [Patents]

Oxygen containing organic compound reactant:
This subclass is indented under subclass 194. Process wherein an oxygen containing compound acts as a source of carbon or halogen in the product.

Subclass: 196 [Patents]

Halogenation of acyclic carbon:
This subclass is indented under subclass 191. Process wherein halogen is bonded directly to an acyclic carbon atom.

Subclass: 197 [Patents]

Catalyst utilized:
This subclass is indented under subclass 196. Process which employs a catalyst.

Subclass: 198 [Patents]

Halogen containing catalyst:
This subclass is indented under subclass 197. Process wherein the catalyst contains an atom of halogen.

Subclass: 199 [Patents]

Bonding benzene rings to the same acyclic carbon or to an acyclic carbon chain:
This subclass is indented under subclass 190. Process wherein plural benzene rings are bonded to the same carbon atom which is not part of any ring or are bonded to each other through a chain of two or more carbon atoms, none of which is a part of any ring.

Subclass: 200 [Patents]

Preparing acyclic carbon to carbon unsaturation containing compound:
This subclass is indented under subclass 190. Process wherein the compound prepared contains carbon to carbon unsaturation which is not part of a ring.

Subclass: 201 [Patents]

Oxygen containing organic compound reactant:
This subclass is indented under subclass 190. Process wherein an organic oxygen containing compound is a source of carbon or halogen in the product.

Subclass: 202 [Patents]

Isomerization:
This subclass is indented under subclass 190. Process wherein a compound is converted into another compound of differing structure but of the same empirical formula as the starting compound.

Subclass: 203 [Patents]

Oxyhalogenation:
This subclass is indented under subclass 190. Process wherein an elemental oxygen and hydrogen halide are reacted to produce halogen in situ and introduce halogen into a benzene ring containing compound.
(1) Note. The hydrogen halide may be introduced, as such, or may be produced in situ, for instance, as a by-product.

Subclass: 204 [Patents]

Dehalogenation or dehydrohalogenation:
This subclass is indented under subclass 190. Process wherein a halogen atom or a molecule of hydrogen halide is removed from a compound to prepare a compound classified thereunder.

Subclass: 205 [Patents]

Of alicyclic ring to prepare benzene ring:
This subclass is indented under subclass 204. Process wherein halogen or hydrogen halide is removed from an alicyclic ring to produce a benzene ring.

Subclass: 206 [Patents]

Bonding halogen directly to benzene ring:
This subclass is indented under subclass 190. Process wherein halogen is bonded directly to a carbon atom of a benzene ring.

Subclass: 207 [Patents]

Chlorination:
This subclass is indented under subclass 206. Process wherein chlorine is the halogen bonded to a benzene ring.

Subclass: 208 [Patents]

Catalyst utilized:
This subclass is indented under subclass 207. Process employing a catalyst.

Subclass: 209 [Patents]

Sulfur containing catalyst:
This subclass is indented under subclass 208. Process wherein the catalyst contains sulfur.

Subclass: 210 [Patents]

Metal halide containing catalyst:
This subclass is indented under subclass 208. Process wherein the catalyst contains an atom of metal and an atom of halogen.

Subclass: 211 [Patents]

Purification or recovery:
This subclass is indented under subclass 190. Process wherein a benzene ring containing compound is purified or recovered.

Subclass: 212 [Patents]

Forming alicyclic ring from benzene ring:
This subclass is indented under subclass 101. Process wherein a benzene ring is converted to an alicyclic ring, e.g., addition chlorination of benzene to produce 1,2,3,4,5,6-hexachlorocyclohexane.

Subclass: 213 [Patents]

Purification or recovery of 1,2,3,4,5,6-hexachlorocyclohexane (i.e., benzene hexachloride):
This subclass is indented under subclass 101. Process wherein a 1,2,3,4,5,6-hexachlorocyclohexane is separated from a mixture or in which impurities are separated from said compound.
(1) Note. Many patents in this subclass relate to the separation of the various isomers of this compound.

Subclass: 214 [Patents]

Ring formation, ring expansion or contraction or bonding one alicyclic ring directly or indirectly to another alicyclic ring:
This subclass is indented under subclass 101. Process wherein a new alicyclic ring is created which did not exist in any of the reactants, wherein the number of carbon atoms in a ring is increased or decreased, or wherein an alicyclic ring is bonded directly or indirectly to another alicyclic ring.

Subclass: 215 [Patents]

Diels-alder reaction:
This subclass is indented under subclass 214. Process wherein a conjugated diene is reacted with carbon to carbon unsaturation to produce a new six member carbocyclic ring, e.g., see struture below. [figure]
(1) Note. Either the conjugated diene or the unsaturated compound may already be part of a carbocyclic ring, in which case, a polycyclo compound results. Also, a triple bond may be employed instead of a double bond, in which case, an additional double bond will be found in the product.

Subclass: 216 [Patents]

Processes of preparing, purifying, or recovering unsaturated compound:
This subclass is indented under subclass 101. Process wherein a compound containing carbon to carbon unsaturation
is prepared, purified, or recovered.

Subclass: 217 [Patents]

From carbon source other than hydrocarbon, halocarbon, or halohydrocarbon:
This subclass is indented under subclass 216. Process wherein at least one atom of carbon in the product is derived from a substance other than a compound of carbon and hydrogen, carbon and halogen, or a compound of carbon, hydrogen, and halogen.

Subclass: 218 [Patents]

Decreasing the number of carbon atoms in the compound:
This subclass is indented under subclass 216. Process wherein the compound formed has fewer carbon atoms than a compound which is a source of carbon.

Subclass: 219 [Patents]

Plural diverse reactions in separate zones:
This subclass is indented under subclass 216. Process wherein different reactions are carried out in different zones.This subclass requires that at least one different reactant is added in a latter zone.
(1) Note. Mere plural addition of more of the same ingredient in a subsequent zone, e.g., multistage halogen addition, etc., will not place a patent in this or indented subclasses.
(2) Note. While at least one reaction must produce compound as required by subclass 216, the other diverse reaction may be of any type, e.g., preparation of halogenating agent by chemical reaction.

Subclass: 220 [Patents]

Dehalogenation or dehydrohalogenation with halogenation in separate zones:
This subclass is indented under subclass 219. Process wherein one step removes an atom of halogen or hydrogen and halogen, and another step introduces an atom of halogen.
(1) Note. These steps may take place in any order.

Subclass: 221 [Patents]

Acetylene reactant:
This subclass is indented under subclass 220. Process wherein acetylene is employed in a step in such a way that is becomes a source of carbon in the final product.

Subclass: 222 [Patents]

Including oxyhalogenation or oxidation with elemental oxygen:
This subclass is indented under subclass 220. Process wherein one step includes reaction with a mixture of elemental oxygen and hydrogen halide whereby halogen is generated in situ or in which a step includes oxidation with elemental oxygen, e.g., of copper halide melt, etc.

Subclass: 223 [Patents]

Including oxyhalogenation or oxidation with elemental oxygen:
This subclass is indented under subclass 219. Process wherein one step includes reaction with a mixture of elemental oxygen and hydrogen halide whereby halogen is generated in situ or in which a step includes oxidation with elemental oxygen, e.g., of copper halide melt, etc.

Subclass: 224 [Patents]

Oxyhalogenation:
This subclass is indented under subclass 216. Process which includes reaction with a mixture of elemental oxygen and hydrogen halide whereby halogen is generated in situ.

Subclass: 225 [Patents]

Liquid medium or inorganic melt utilized:
This subclass is indented under subclass 224. Process wherein the reaction takes place in a liquid medium or inorganic melt.

Subclass: 226 [Patents]

Dehydrohalogenation:
This subclass is indented under subclass 216. Process wherein a molecule of hydrogen halide is removed from a compound.

Subclass: 227 [Patents]

Catalyst utilized:
This subclass is indented under subclass 226. Process employing a catalyst.

Subclass: 228 [Patents]

Catalyst in liquid phase:
This subclass is indented under subclass 227. Process wherein the catalyst is employed in a liquid phase.

Subclass: 229 [Patents]

Including chemical reaction with by-product hydrogen halide:
This subclass is indented under subclass 226. Process wherein a substance is present to react with the hydrogen halide removed from the compound.
(1) Note. This substance may be a base which react to form a salt, e.g., NaOH or an amine, etc., or an alcohol which reacts to form an alkyl halide, etc.

Subclass: 230 [Patents]

Dehalogenation or dehydrogenation:
This subclass is indented under subclass 216. Process wherein an atom of halogen or an atom of hydrogen is removed from a compound which is a source of carbon in the product.

Subclass: 231 [Patents]

Addition reaction of free halogen or hydrogen halide to carbon to carbon unsaturation:
This subclass is indented under subclass 216. Process wherein two atoms of elemental halogen or a molecule of hydrogen halide is added to carbon to carbon unsaturation, thus decreasing the degree of unsaturation in a compound.
(1) Note. The final product must still contain carbon to carbon unsaturation.

Subclass: 232 [Patents]

To triple bond:
This subclass is indented under subclass 231. Process wherein elemental halogen or hydrogen halide is added to a triple bond.

Subclass: 233 [Patents]

To acetylene:
This subclass is indented under subclass 232. Process wherein the triple bond containing compound is acetylene, per se.

Subclass: 234 [Patents]

Elemental halogen reactant:
This subclass is indented under subclass 216. Process wherein elemental halogen is employed as a source of halogen in the product.

Subclass: 235 [Patents]

Metal halide reactant:
This subclass is indented under subclass 216. Process wherein a compound containing metal and halogen is employed as a source of halogen in the product.

Subclass: 236 [Patents]

Isomerization:
This subclass is indented under subclass 216. Process wherein a compound is converted into another compound of differing structure but of the same empirical formula as the starting compound.

Subclass: 237 [Patents]

Increasing the number of carbon atoms in the compound:
This subclass is indented under subclass 216. Process wherein the final product contains more carbon atoms in a molecule than any of the reactants.

Subclass: 238 [Patents]

Purification or recovery:
This subclass is indented under subclass 216. Process wherein a compound containing carbon to carbon unsaturated is separated from a mixture or in which impurities are separated from said compound.

Subclass: 239 [Patents]

Including contact with solid agent:
This subclass is indented under subclass 238. Process wherein the purification or recovery includes a step of contacting with a substance which remains solid throughout the process and which substance effects purification or recovery, e.g., sorption, etc.

Subclass: 240 [Patents]

Preparing from elemental carbon, inorganic carbide, carbon disulfide, or carbon oxide:
This subclass is indented under subclass 101. Process wherein elemental carbon, an inorganic carbide, carbon disulfide, or a carbon oxide is employed as a source of carbon in the product.

Subclass: 241 [Patents]

Preparing utilizing plural diverse reactions in separate zones:
This subclass is indented under subclass 101. Process wherein different reactions are carried out in different zones.This subclass requires that at least one different reactant is added in a latter zone.
(1) Note. Mere plural addition of more of the same ingredient in a subsequent zone, e.g., multistage halogen addition, etc., will not place a patent in this or the indented subclass.
(2) Note. While at least one reaction must produce a compound under subclass 101, the other diverse reaction may be any type, e.g., preparation of halogenating agent by chemical reaction, etc.

Subclass: 242 [Patents]

Addition reaction of hydrogen chloride to carbon to carbon unsaturation with chlorination in separate zone:
This subclass is indented under subclass 241. Process wherein in one zone hydrogen chloride is added to carbon to carbon unsaturation and in another zone chlorine replaces hydrogen in the same compound.
(1) Note. These reactions may occur in any order.

Subclass: 243 [Patents]

Preparing by oxyhalogenation:
This subclass is indented under subclass 101. Process which includes reaction with a mixture of hydrogen halide and elemental oxygen whereby halogen is generated in situ.

Subclass: 244 [Patents]

Liquid medium or inorganic melt utilized:
This subclass is indented under subclass 243. Process wherein the reaction takes place in a liquid medium or an inorganic melt.

Subclass: 245 [Patents]

Fixed bed catalyst utilized:
This subclass is indented under subclass 243. Process wherein the catalyst is solid and remains in a fixed position
relative to the apparatus during the reaction.

Subclass: 246 [Patents]

Preparing by addition of elemental halogen, interhalogen compound, or hydrogen halide to carbon to carbon unsaturation:
This subclass is indented under subclass 101. Process wherein elemental halogen, an interhalogen compound, or hydrogen halide is added to carbon to carbon unsaturation, thus reducing the degree of unsaturation.

Subclass: 247 [Patents]

Catalyst or reaction directing agent utilized:
This subclass is indented under subclass 246. Process including a catalyst which promotes the reaction or an agent which causes the addition to take place in a particular way to favor the production of one possible product over another.

Subclass: 248 [Patents]

Hydrogen halide reactant:
This subclass is indented under subclass 247. Process wherein hydrogen halide is added to carbon to carbon unsaturation.

Subclass: 249 [Patents]

Nonmetallic catalyst or reaction directing agent utilized:
This subclass is indented under subclass 248. Process wherein the catalyst or reaction directing agent does not contain any atoms of a metal.

Subclass: 250 [Patents]

Catalyst or reaction directing agent:
This subclass is indented under subclass 248. Containing a Group VIII Metal Utilized: Process wherein the catalyst or reaction directing agent contains an atom of a Group VIII metal.

Subclass: 251 [Patents]

All reactants in vapor phase:
This subclass is indented under subclass 246. Process wherein all reactants are in the vapor phase in the reaction zone.

Subclass: 252 [Patents]

Elemental halogen reactant:
This subclass is indented under subclass 101. Process wherein elemental halogen is employed as a source of halogen in the product.

Subclass: 253 [Patents]

Catalyst or reaction directing agent utilized:
This subclass is indented under subclass 252. Process including a catalyst which promotes the reaction or an agent which causes the reaction to take place in a particular way to favor one possible product over another.

Subclass: 254 [Patents]

Inorganic metal containing catalyst or reaction directing agent utilized:
This subclass is indented under subclass 253. Process wherein the catalyst or reaction directing agent contains a metal atom and no organic material.

Subclass: 255 [Patents]

All reactants in vapor phase:
This subclass is indented under subclass 252. Process wherein all reactants are in the vapor phase in the reaction zone.

Subclass: 256 [Patents]

Isomerization:
This subclass is indented under subclass 101. Process wherein a compound is converted to another compound of differing structure but of the same empirical formula as the starting compound.

Subclass: 257 [Patents]

Preparing by increasing the number of carbons in the compound:
This subclass is indented under subclass 101. Process wherein the final product contains more than carbon atoms in a molecule than any of the reactants.

Subclass: 258 [Patents]

Preparing by reacting hydrogen halide with a compound which contains hydroxy bonded directly to carbon:
This subclass is indented under subclass 101. Process wherein a hydroxy group bonded directly to carbon is reacted with hydrogen halide to replace the hydroxy group with halogen.

Subclass: 259 [Patents]

Preparing by reacting ether with hydrogen halide:
This subclass is indented under subclass 101. Process wherein an ether is reacted with hydrogen halide to replace the oxygen atom with halogen.

Subclass: 260 [Patents]

Preparing by halogen exchange:
This subclass is indented under subclass 101. Process wherein a halogen atom in a compound is replaced with a different halogen.

Subclass: 261 [Patents]

Halogen source is a compound other than hydrogen halide:
This subclass is indented under subclass 101. Process
wherein a source of halogen in there product is a compound other than hydrogen halide, e.g., NH[subscrpt]4[end subscrpt]Cl, etc.
(1) Note. Include hereunder is the transfer of halogen from one organic compound to another to produce a product for this class, e.g., transhalogenation, etc.

Subclass: 262 [Patents]

Purification or recovery:
This subclass is indented under subclass 101. Process wherein a halogen containing compound is separated from a mixture or in which impurities are separated from said compound.

Subclass: 263 [Patents]

Liquid-liquid extraction:
This subclass is indented under subclass 262. Process wherein a substance is transferred from one liquid phase to another liquid phase essentially insoluble in the first liquid phase.

Subclass: 264 [Patents]

Preservation or stabilization treatment:
This subclass is indented under subclass 101. Process of treating a compound to increase its stability or prevent or reduce deterioration.
(1) Note. This process may include contacting with a chemical agent or a physical treatment, e.g., heating, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:
102 for a process of adding an agent as a preservative or stabilizer which remains with the compound.
211 238+ and 262+, for processes of increasing the stability of a compound by purification.


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Last Modified: 6 October 2000