| | (2)
Note. The following classes are superior to this class (34)
and takes the subject matter there provided for, even though involving drying
and/or gas or vapor contact with solids:
Class 8, Bleaching and Dyeing; Fluid Treatment and Chemical
Modification of Textiles and Fibers.
Class 12, Boot and Shoe Making, has the following line: Processes
and apparatus for drying only are in Class 34. Where in addition
to the drying there are steps of or means for shoe manufacture,
the patents are in Class 12. Class 12 also includes (see particularly
subclasses 1, 41.1, 41.3, and 41.5) processes and apparatus for
treating shoes or shoe parts by steam or other vapors, moisture
or moist air to temper or soften the shoes.
Class 19, Textiles: Fiber Preparation.
Class 26, Textiles: Cloth Finishing. Subclasses 71+ take
cloth drying or heating with means for expanding (e.g., stretching, spreading)
a running length web of the cloth; or steps for applying a stretching
or spreading force to the fabric in addition to that incidental
to mere feed of the fabric through the machine.
Class 28, Textiles: Manufacturing, subclasses 217+ for
thread finishing combined with drying.
Class 38, Textiles: Ironing or Smoothing, has processes and
apparatus for producing a smooth appearance on the surface of a
textile article or fabric, most of which necessarily produce a concurrent
drying action and some of which have gas or vapor contact means,
particularly subclasses 3, 14+ and 77.1+.
Class 43, Fishing, Trapping, and Vermin Destroying. See particularly
subclasses 124+ for destruction of vermin by gases and
vapors.
Class 44, Fuel and Related Composition.
Class 47, Plant Husbandry.
Class 48, Gas: Heating and Illuminating.
Class 57, Textiles: Spinning, Twisting, and Twining.
Class 65, Glass Manufacturing.
Class 66, Textiles: Knitting.
Class 68, Textiles: Fluid Treating Apparatus, particular attention
being called to subclasses 5+ for textile gas or vapor
treating apparatus; subclasses 19+ for drying combinations,
and subclasses 241+ for wringers, per se.
Class 71, Chemistry: Fertilizers.
Class 72, Metal Deforming, subclasses 41+ for disclosure
of work lubricating.
Class 75, Specialized Metallurgical Processes, Compositions
for Use Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate Mixtures.
Class 87, Textiles: Braiding, Netting, and Lace Making.
Class 99, Foods and Beverages: Apparatus, (1) takes apparatus
for treating food materials, in which, in addition to drying and/or gas
or vapor contact there are additional means for performing additional
treating operations on food (for example, adding ingredients, comminuting,
forming, etc.); (2) takes apparatus for treating foods by gas or
vapor contact for moistening. See Class 99, subclasses 468+ for
apparatus of that class type providing an enclosed modified atmosphere,
and subclasses 516+ for the application of treating fluid.
Class 101, Printing. Note particularly subclasses 416.1+ and
the notes thereto.
Class 106, Compositions: Coating or Plastic.
Class 109, Safes, Bank Protection, or a Related Device, subclasses
20 and 29+.
Class 127, Sugar, Starch, and Carbohydrates.
Class 132, Toilet.
Class 139, Textiles: Weaving.
Class 140, Wireworking.
Class 144, Woodworking, see particularly subclasses 50+,
254 and 271.
Class 148, Metal Treatment.
Class 149, Explosive and Thermic Compositions or Charges.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture.
159, Concentrating Evaporators, for drying apparatus or processes
which start with a liquid suspension or solution of solids and concentrate
the same, even though carried to the point of complete dryness of
the solids.
162, Paper Making and Fiber Liberation, for combination of
drying or gas or vapor contact with solids combined with a paper making
or fiber liberation step there provided for; see especially subclasses
290, 359 and 375+ for such combinations including heating
or heat exchange means.
169, Fire Extinguishers, for such apparatus and processes,
per se, Class 34 having combinations involving such subject matter;
see particularly subclasses 43+, 83 and 90.
196, Mineral Oils: Apparatus, for apparatus for the treatment
of mineral oils.
201, Distillation: Processes, Thermolytic. See Lines With
Other Classes of the class definition of Class 201 for the line.
202, Distillation: Apparatus, and see Lines With Other Classes
to the class definition of Class 202 for the line.
203, Distillation: Processes, Separatory. See Lines With Other
Classes of the class definition of Class 203 for the line.
204, Chemistry: Electrical and Wave Energy.
208, Mineral Oils: Processes and Products, for processes of
treating and preparing mineral oils including their separation from sands,
coal or shales.
245, Wire Fabrics and Structure.
252, Compositions, particularly subclasses 60 and 61, for
physical separation agents.
260, Chemistry of Carbon Compounds. It is noted that the removal
of water of crystallization is considered a chemical manufacturing
operation for Class 260.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, the line between Classes 34 and 264 in regard to processes for
spinning (by extrusion) and drying the extruded filament in a significant
manner, is that Class 34 takes such inventions when the extrusion
step is not significantly claimed. Class 264 takes methods, per
se, for treating a plastic body with a vapor to smooth or polish
the surface, subclass 341.
266, Metallurgical Apparatus, subclasses 251+ for
means treating solid metal objects by contacting the object with
a gas to bring about a metallurgical change in the object, e.g.,
gas quenching.
270, Sheet-Material Associating.
291, Track Sanders, particularly subclasses 3+, 18,
and 19+.
396, Photography, subclass 579 for the use of a gaseous fluid
treating apparatus in photography.
399, Electrophotography, subclass 338 for fixing an image
to a copy medium by heat contact.
404, Road Structure, Process, or Apparatus, subclasses 83+.
422, Chemical Apparatus and Process Disinfecting, Deodorizing,
Preserving, or Sterilizing, has the following line with Class 34:
Processes and Apparatus for preserving, disinfecting, or sterilizing
by drying only, or drying combined with special ray treatment only,
are in Class 34. Where in addition to the drying and/or
special ray treatment steps or apparatus, there are additional steps
or apparatus to perform disinfecting, deodorizing, preserving, or sterilizing,
the patent is placed in Class 422, or placed in classes which provided
for the additional combined operations, e.g., Class 8, Bleaching
and Dyeing; Fluid Treatment and Chemical Modification of Textiles
and Fibers, or Class 427, Coating Processes, etc.
423, Chemistry of Inorganic Compounds, it is noted that the
removal of water of crystallization is considered a chemical reaction for
Class 423.
424, Drug, Bio-Affecting and Body Treating Compositions.
425, Plastic Article or Earthenware Shaping or Treating: Apparatus,
appropriate subclass for shaping or reshaping apparatus for plastic
material combined with drying means, especially subclasses 72.1+ for
a shaping orifice and downstream gaseous treating means and subclasses
73+ for such apparatus combined with a ventilating hood or
chamber.
426, Food or Edible Material: Processes, Compositions, and
Products, (1) takes all.
430, Radiation Imagery Chemistry: Process, Composition, or
Product Thereof.
435, Chemistry: Molecular Biology and Microbiology, subclasses
283.1+, particularly subclass 284.1, for apparatus for
preserving differentiated tissue or organs; subclass 307.1 for apparatus
for preserving micro-organisms and subclass 308.1 for apparatus
for separating micro-organisms from culture media.
460, Crop Threshing or Separating.
493, Manufacturing Container or Tube From Paper; or Other
Manufacturing From a Sheet or Web.
502, Catalyst, Solid Sorbent, or Support, Therefor: Product
or Process of Making, subclasses 20+ for a process of regenerating
or reactivating a catalyst or sorbent, other than mere drying.
504, Plant Protecting and Regulating Compositions.
516, Colloid Systems and Wetting Agents; Subcombinations Thereof;
Processes of Making, Stabilizing, Breaking, or Inhibiting, subclasses
113+ for compositions for or subcombination compositions
for or breaking of or inhibiting of colloid systems (e.g., foam
breaking, emulsion breaking, dispersion inhibiting, suspension settling, gel
breaking, smoke suppressing, coagulating, flocculating), when generically claimed
or when there is no hierarchically superior provision in the USPC
for the specifically claimed art.
585, Chemistry of Hydrocarbon Compounds, subclass 15 for synthesis
of a hydrocarbon hydrate with subsequent removal of water therefrom.
588, Hazardous or Toxic Waste Destruction or Containment,
this is the generic class for permanently containing any form of
hazardous or toxic waste, or for chemically destroying non-gaseous
hazardous or toxic waste (i.e., too hazardous or toxic to be placed
in an ordinary municipal landfill).
607, Surgery: Light, Thermal, and Electrical Application,
see particularly subclasses 1+.
(3) NOTE TO THIS SECTION |
| 4, | Baths, Closets, Sinks, and Spittoons, has such subject matter having as a part thereof means
to dry and/or contact with gases or vapors particularly
subclasses 111.1+ for dry closets with driers or burners, subclasses
524+ for vapor or hot air baths, and subclasses 209+ for
ventilating means. (Special types of Class 34 subject matter or
combinations. See (3) Note of Lines With Other Classes). |
| 5, | Beds, appropriate subclasses particularly
subclasses 421 , 690, or 724+ for mattress ventilation,
inspection or heating. (Special types of Class 34 subject matter
or combinations. See (3) Note of Lines With Other Classes). |
| 15, | Brushing, Scrubbing, and General Cleaning, has the characters of apparatus there provided for,
even though the sole disclosed function is for drying. Relative
to the air blast and suction apparatus, those which remove liquids
by an air blast or suction cleaner action are in Class 15 and those
which remove liquids by evaporative action are in Class 34. Apparatus
for drying and/or gas or vapor contact with solids involving
the types of operations for Class 15 in combination with other types
for Class 34 are placed in Class 34. Apparatus involving Class 15
type structures (excepting the situation outlined in the first and
third sentences of this paragraph) combined with Class 34 type structures
are placed in Class 15. (Special types of Class 34 subject matter
or combinations. See (3) Note of Lines With Other Classes). |
| 30, | Cutlery,
subclasses 34.05 and 123 and their indented subclass, particularly
subclasses 41, 128+ and 140, has cutlery combined with
driers and/or gas or vapor contact means built as part
of the structure thereof. (Special types of Class 34 subject matter
or combinations. See (3) Note of Lines With Other Classes). |
| 36, | Boot, Shoes, and Leggings,
subclasses 2.6 and 3, has heated and ventilated boots and shoes. (special
types of Class 34 subject matter or combinations). |
| 51, | Abrasive Tool Making Process, Material, or Composition, for an abrasive tool making process involving drying
and/or gas or vapor contact with solids. (Special types
of Class 34 subject matter or combinations. See (3) Note of Lines
With Other Classes). |
| 52, | Static Structures (e.g., Buildings), (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 62, | Refrigeration, has apparatus and processes for separating liquids
from other materials by refrigerating operations, Class 34 having
the same combined with other apparatus or processes for drying and/or
gas or vapor contact with solids. (Special types of Class 34 subject matter
or combinations. See (3) Note of Lines With Other Classes). |
| 95, | Gas Separation: Processes, appropriate subclasses (a) for the separation of
a gas from a fluid mixture in combination with the regeneration
of the separating media by drying or by gas or vapor contact and
(b) the subcombination of the separation of a gas from a fluid mixture.
(Special types of Class 34 subject matter or combinations. See (3)
Note of Lines With Other Classes). |
| 96, | Gas Separation: Apparatus, appropriate subclasses (a) for apparatus for the
separation of a gas from a fluid mixture in combination with means
to regenerate the separating media by drying or by gas or vapor
contact and (b) the subcombination of apparatus for the separation of
a gas from a fluid mixture. (Special types of Class 34 subject matter
or combinations. See (3) Note of Lines With Other Classes). |
| 99, | Foods and Beverages: Apparatus, Line with Class 34. Class 99 takes all cooking apparatus. (Material
heating and heat generating class. See (1) Note of Lines With Other
Classes). |
| 100, | Presses, appropriate subclasses for presses not elsewhere provided
for, and particularly
subclasses 92+ for presses combined with means to heat the material.
Class 100 has expressing of liquids from material, per se, (particularly
in subclasses 104+) and expressing combined with heating
of the materials undergoing expressing. Expressing combined with
drying of the solids other than by heating necessary for expressing
is in Class 34. (Special types of Class 34 subject matter or combinations.
See (3) Note of Lines With Other Classes). |
| 105, | Railway Rolling Stock, particularly
subclasses 160.5 and 451. (Class taking subcombinations of Class
34 matter. See (4) Note of Lines With Other Classes above). |
| 110, | Furnaces, has solid fuel furnaces with means for drying the
fuel burned and/or with means to contact the fuel with
gases or vapors as an incident to burning, and corresponding processes. (Material
heating and heat generating class. See (1) Note of Lines With Other
Classes). |
| 118, | Coating Apparatus,
subclasses 58+ for coating apparatus combined with means to heat,
dry, cool or contact the work with a noncoating gas or vapor, and
subclasses 715+ for apparatus for coating work with a gas
or vapor other than steam. Coating or impregnating with steam is in
Class 34. Apparatus for treating a coating with a solvent vapor,
per se, to smooth, polish or coalesce the coating is in Class 34.
(Special types of Class 34 subject matter or combinations. See (3)
Note of Lines With Other Classes). |
| 122, | Liquid Heaters and Vaporizers, having means to dry the solid fuel burned and/or
with means to contact the fuel with gases or vapors as an incident
to burning, and corresponding processes. (Material heating and heat
generating class. See (1) Note of Lines With Other Classes). |
| 126, | Stoves and Furnaces, has: (1) Solid Fuel burning subcombinations having
means to dry the solid fuel burned and/or with means to
contact the fuel with gases or vapors as an incident to burning
and corresponding processes. (2) Combination of fuel (solid or fluid)
burners with means to apply heat or general utility, having no means
specialized for drying, and corresponding processes. If a patent
has any claim restricted to a drying process, the patent is placed
in Class 34 and cross-referenced to Class 126 for the heating apparatus.
(Material heating and heat generating class. See (1) Note of Lines
With Other Classes). |
| 131, | Tobacco, line with Class 34: (1) Processes of drying and/or
treating tobacco with gases and/or vapors both, per se,
and combined with other treatments are in Class 131. (2) Tobacco
drying apparatus combined with means to perform other operations
is in Class 131. (3) Tobacco drying apparatus, per se, is in Class
34. (Special types of Class 34 subject matter or combinations. See
(3) Note of Lines With Other Classes). |
| 135, | Tent, Canopy, Umbrella, or Cane, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above) |
| 138, | Pipes and Tubular Conduits, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 141, | Fluent Material Handling, With Receiver or Receiver
Coacting Means, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 164, | Metal Founding, appropriate subclasses for processes and apparatus
for mold forming and drying. (Special types of Class 34 subject
matter or combinations. See (3) Note of Lines With Other Classes). |
| 165, | Heat Exchange, the line with Class 34 is: (1) Class 34 takes all
patents having any claim restricted to a process of drying. (2)
Class 34 takes all patents having any claim restricted to a process
which involves contacting a solid undergoing treatment with a gas
or vapor. (3) Class 165 takes all heat exchange processes not limited
as in (1) or (2) above. (4) Class 34 takes apparatus for exchanging
heat between fluent materials combined with added means for drying
and/or contacting solids undergoing treatment with gases
or vapors. (5) Class 165 has apparatus exchanging heat between fluent materials
not having the added features set forth in (4) above, even though
discharge of gases or vapors to an enclosure is claimed, where there
is no means to promote contact with solids and/or to handle
solids therein. (Material heating and heat generating class. See
(1) Note of Lines With Other Classes). |
| 174, | Electricity: Conductors and Insulators, has drying means constituting a part of the structure,
particularly
subclasses 8+ . (Special types of Class 34 subject matter or combinations.
See (3) Note of Lines With Other Classes). |
| 192, | Clutches and Power-Stop Control, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 193, | Conveyors, Chutes, Skids, Guides, and Ways, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 198, | Conveyors: Power-Driven, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 201, | Distillation: Processes, Thermolytic, see Lines With Other Classes of the class definition
of Class 201 for the line. (Material heating and heat generating
class. See (1) Note of Lines With Other Classes). |
| 202, | Distillation: Apparatus, see Lines With Other Classes of the class definition
of Class 202 for the line. (Material heating and heat generating class.
See (1) Note of Lines With Other Classes). |
| 203, | Distillation: Processes, Separatory, see Lines With Other Classes of the class definition
of Class 203 for the line. (Material heating and heat generating
class. See (1) Note of Lines With Other Classes). |
| 209, | Classifying, Separating, and Assorting Solids, has the combination with drying, particularly
subclasses 2 , 3, 10, and 11, except where the sole separation
is of a portion of the material for recirculation for further drying,
which is in Class 34, particularly subclasses 10, 11, 57, and 102,
and those patents in which the treating gas or vapor may incidentally
carry away some solids where no classifying, separating or assorting
is intended, even though such solids may be separated from the gas
or vapor, are in subclasses 26+, 32, and 79+.
Class 209 has all processes and apparatus for contacting solids with
gases or vapors for the purposes of such class see subclasses 132+.
(Special types of Class 34 subject matter or combinations. See (3)
Note of Lines With Other Classes). |
| 210, | Liquid Purification or Separation, has (1) apparatus for separating or treating liquids mixed
with solids, which mixture is in a flowable condition, see particularly
subclasses 175+ for separators combined with means to heat the
separator. Class 34 takes such separators and corresponding processes
when combined with additional and independent driers or means to
contact the separated solids with gas. (2) Class 210 also takes
centrifugal extractors having a perforate wall surrounding the material
or article to be separated from a liquid and Class 34, in subclasses
8 and 58+, takes centrifugal separators having means to
support an article but not provided with a perforate wall (and corresponding
processes where no filtration is defined). |
| 211, | Supports: Racks, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 219, | Electric Heating,
subclasses 600+ for inductive heating, subclasses 678+ for
microwave heating, subclasses 764+ for capacitive dielectric heating,
and subclass 50, has metal heating even though involving gas or
vapor contact with the metal heated. Note especially subclasses
72+ subclasses 200+ has electric heating means
combined with means to apply heat of general utility, having no
means specialized for drying, and corresponding processes; see particularly
subclass 280 for liquid and gas heaters, subclasses 391+ for
ovens. If a patent has claim restricted to a drying process, it
is placed in Class 34 and cross-referenced to Class 219 for the
heating apparatus, except that if the claimed process is in fact
no more than electric heating of the work the patent is classified
in Class 219. (Material heating and heat generating class. See (1)
Note of Lines With Other Classes). |
| 221, | Article Dispensing, appropriate subclasses for article dispensers not
otherwise provided for. Class 221 takes subcombinations of Class
34 subject matter as relate to article dispensing (feeding) devices,
per se. See the class definition of Class 221 for the disposition
of other related art. (Class taking subcombinations of Class 34
matter. See (4) Note of Lines With Other Classes above). |
| 222, | Dispensing, and see the reference to Class 34, under section
24 of the main class definition for the line. (Class taking subcombinations
of Class 34 matter. See (4) Note of Lines With Other Classes above). |
| 223, | Apparel Apparatus, and see Note (6) to the main class definition thereof
for the line with Class 34. (Special types of Class 34 subject matter
or combinations. See (3) Note of Lines With Other Classes). |
| 226, | Advancing Material of Indeterminate Length, appropriate subclasses for methods of, and apparatus
for, feeding material without utilizing the leading or trailing
ends to effect movement of the material. (Class taking subcombinations
of Class 34 matter. See (4) Note of Lines With Other Classes above). |
| 236, | Automatic Temperature and Humidity Regulation, has such means and corresponding processes not involving
specific characteristics of the apparatus or process steps for this
class (34). (Special types of Class 34 subject matter or combinations.
See (3) Note of Lines With Other Classes). |
| 237, | Heating Systems, the line with Class 34 is: (1) Class 34 takes all
processes limited to drying. (2) Class 237 takes processes of heating
enclosures, not limited to drying. (3) Class 34 takes the combination
of a heating system not claiming combustion heating means in combination with
means to apply the heat and/or the heated gases or vapors
to solids or such means in combination with material handling or
supporting means. For such combinations with combustion heating
means, see Class 432, Heating. (4) Class 237 takes the heating system
subcombination and in combination with an enclosure to be heated.
(Material heating and heat generating class. See (1) Note of Lines
With Other Classes). |
| 241, | Solid Material Comminution or Disintegration, appropriate subclasses, for solid material comminution
combined with either drying or gas and vapor contact. Where the
material handling means has no special features of construction to
cause comminution (as feeding means, agitating means, etc.), the
patent is in Class 34, even though incidental breaking up of the material
may occur. See section 6 of the main class definition of Class 241.
(Special types of Class 34 subject matter or combinations. See (3)
Note of Lines With Other Classes). |
| 242, | Winding, Tensioning, or Guiding, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 248, | Supports, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 261, | Gas and Liquid Contact Apparatus, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 312, | Supports: Cabinet Structure, has the structure of such devices, including those combined
with static gas or vapor treating means in
subclass 31 , and see note (1) to the definition of subclasses
31+ for the line. Cabinet structures combined with ventilating
means are in subclass 166 and with heater for purposes other than
drying, are in subclass 167. (Special types of Class 34 subject
matter or combinations. See (3) Note of Lines With Other Classes). |
| 312, | Supports: Cabinet Structure,
subclasses 31+ for cabinets with gas or vapor treatment of material,
subclass 213 for cabinets with ventilated or foraminous walls, subclass
214 for cabinets with spaced or insulated walls, subclass 229 for
cabinets with drains and subclass 236 for cabinets with heat exchange
means. (Class taking subcombinations of Class 34 matter. See (4)
Note of Lines With Other Classes above). |
| 366, | Agitating, the line with Class 34 is: Class 34 takes all patents
having any claim restricted to a drying process. Class 366 takes
agitating processes not limited to drying. Class 366 takes agitators,
per se, including agitators in which the mixing is through the medium
of a fluid fed for mixing and not drying purposes, agitators with
means to dry materials prior to feeding to and/or subsequent
to discharge from the agitator, agitators combined with means to
heat the material during agitation for purposes other than drying,
and agitators with means to incorporate a fluid (including a gas)
in the final product. Class 34 has drying apparatus and apparatus
for contacting solids with gases or vapors, even though agitating
means is included, not classifiable in Class 366, under (3). (Special
types of Class 34 subject matter or combinations. See (3) Note of
Lines With Other Classes). |
| 373, | Industrial Electric Heating Furnaces, line with Class 34: (1) Class 34 takes all patents
claiming a process of drying, even though electric furnace structure
is also claimed. (2) Class 373 takes electric furnace processes
of heating, not limited to drying. (3) Class 373 takes electric furnace
structures. (Material heating and heat generating class. See (1)
Note of Lines With Other Classes). |
| 406, | Conveyors: Fluid Current, for such conveyors and processes having no means
or steps for drying and/or contacting solids with gases
or vapors in addition to those required for fluid current conveying.
(Class taking subcombinations of Class 34 matter. See (4) Note of
Lines With Other Classes above). |
| 414, | Material or Article Handling, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 426, | Food or Edible Material: Processes, Compositions,
and Products, for processes. Line with Class 34. (1) Class 34
takes the drying, per se, of edible material. (2) Class 426, takes
the cooking and roasting of foods, gas or vapor contact for moistening
edible material and a food working step combined with a gas or vapor
contact with a solid (edible material). (Material heating and heat
generating class. See (1) Note of Lines With Other Classes). |
| 427, | Coating Processes,
subclasses 372.2+ for processes of drying a coating. Processes of
coating portions of a substrate to shield the substrate against
drying are provided for in this class, subclass 9. (Special types
of Class 34 subject matter or combinations. See (3) Note of Lines
With Other Classes). |
| 431, | Combustion, (class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 432, | Heating,
subclasses 1+ for a residual heating process, even though involving
gas or vapor contact with solids, not limited to drying; subclasses
159+ for the combination of a specific combustion products
generator and means providing for contact between work and the generated
products; subclass 198 for apparatus heating work in an externally
heated closed chamber while in contact with a protective or treating
gas; and appropriate subclasses for a drier with specific combustion
heating means claimed and for residual heating apparatus. (Material
heating and heat generating class. See (1) Note of Lines With Other
Classes). |
| 451, | Abrading, particularly
subclass 56 for a process of making or treating an abrasive
tool which may involve drying and/or gas or vapor contact
with solids. (Special types of Class 34 subject matter or combinations.
See (3) Note of Lines With Other Classes). |
| 454, | Ventilation, attention being called to ventilated storage chambers,
subclasses 173+ . (Class taking subcombinations of Class 34 matter.
See (4) Note of Lines With Other Classes above). |
| 494, | Imperforate Bowl: Centrifugal Separators, appropriate subclasses for apparatus and process
for breaking up a mixture of fluids or fluent substances into two
or more components by centrifuging within a generally solid-walled, receptacle-like
member. Included therein is the separation of a particulate solid
from a liquid; however, such drying as may concurrently take place
is secondary to the recovery of one or the other or both, of the
components. Specifically provided for therein are certain aspects
of the separating apparatus such as means for exchanging heat, means
for furnishing an auxiliary fluid, and so forth. (Special types
of Class 34 subject matter or combinations. See (3) Note of Lines
With Other Classes). |
![[Search a list of Patent Appplications for class 34]](../as.gif)
CLASS 34,![[List of Patents for class 34 subclass 58]](../ps.gif)
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