| | This subclass is indented under Class 520, subclass
1. Subject matter drawn to cellular products containing at
least one solid synthetic polymer or to processes of preparing a
cellular product containing at least a solid synthetic polymer.
| | (1)
Note. This subclass includes in addition to cellular products
or processes of preparing same for (1) processes of preparing a
composition which is capable of forming a cellular product upon
exposure to heat or pressure, or to the composition, per se, or
for (2) processes of treating a cellular product with a material
which reacts with or forms a desired composition therewith, or purifies
or treats in some other manner the cellular product and is not elsewhere
provided for or cellular products thereof; or (3) processes of preparing
a composition which is capable of forming a cellular product by
removing a material therefrom without expansion of the composition
or to the composition, per se. |
| | (2)
Note. Included within the definition of cellular products
are foamed products and products which contain pores, cavities,
voids, interstices, or fissures. |
| | (3)
Note. In order to be proper for this subclass, the final product
must be a cellular product and must contain a solid synthetic polymer.
Destruction of the cellular product as by grinding, etc., and wherein
a noncellular solid polymer is recovered is excluded herefrom. Solid polymer
as used throughout this schedule does not exclude polymers which would
be solid except that under the conditions of use their physical
state has been changed to satisfy the process conditions required
(e.g., molten, dissolved). |
| | (4)
Note. In order to be proper for this and the indented subclasses
hereunder, those claims which recite a cell forming composition
must recite that the composition has been perfected in some manner
that is specific to the cellular property, e.g., adding a blowing
agent, adding of cell stabilizing surfactants, etc. Compositions
which are complete or nearly complete and which merely require the application
of heat or the addition of air are proper for classification herein. |
| | (5)
Note. The term "stated ingredient" denotes
the intentional and deliberate presence of an ingredient (other
than a monomer or reactant which forms the polymer backbone) during
a cell forming process.
| |
I. The term "stated ingredient" is limited to:
(A) an amount of a material (e.g., 2 percent of a material, etc.);
(B) (1) a recitation of at least one specified element in compound
or in elemental form (e.g., oxygen-liberating compound, peroxy compound,
chloride-containing, etc.) and (2) groups of elements which can
be identified from the periodic table, other than metal or nonmetal
(e.g., Group IA, transition metal, halogen-containing, etc.); (3)
Compounds which have identified art meaning (e.g., alcohol, ethers, ester,
etc.). |
| |
II. Examples of materials which are described in mere functional
terms and are thereby excluded as being "stated ingredient" since
they do not meet the parameters set out in I, A and B above are
terms such as free radical catalyst, redox catalyst, emulsifier,
dispersant, base, acid, organic medium, blowing agent, etc. | |
| | (6)
Note. Patents which claim an "in situ" preparation
of the "stated ingredient" in the presence of
the monomer or reactants which form the backbone polymer are classified
on the materials which are introduced and co-react to form the "in situ" stated
ingredient. |
| | (7)
Note. Patents in this area are to be classified on the basis
of the claimed final compound or composition that is introduced
into the reaction zone and is in direct contact with any of the
monomers or reactants therein. If it is not possible to so classify
the intro duced material, classification is then made
on the basis of the individual reactants used in the preparation
of the unknown material. In the event that the claims recite both
the individual reactants and identify the product formed there from,
then the original classification should be made in the subclass
that provides for the known product and a cross-reference should
be placed in the appropriate subclass that provides for the reactants. |
| | (8)
Note. Claims to an after-treated product are classified on
the basis of the actual monomers or reactants used in the preparation
of the polymer to be after-treated rather than on the after-treated
polymer, per se. Furthermore, polymers which are to be after-treated
and which already have been exposed to a preliminary after-treatment
step, (e.g., halogenated polymer, alkylated polymer, etc.) are classified
on the basis of the unsaturated monomers or reactants used in the
preparation of the polymer. |
| | (9)
The types of cellular materials set forth in (A)-(F), infra,
are provided for by this class. (G)-(J), infra, provide gurther
elucidation.
| | (A)
A mixture of similar types or different types of solid polymers. |
| | (B)
A mixture of a solid polymer anda resinifiable intermediate
condensation product, the latter being known to form a solid polymer
under the conditions of the reaction if the performed solid polymer were
not present. |
| | (C)
A mixture of a solid polymer and reactable materials, the
latter materials being known to react to form a solid polymer under
the conditions of the reaction if the preformed polymer were not
present. |
| | (D)
A mixture of a solid polymer and a resinifiable intermediate,
the latter combining with the solid polymer and polymerizing under
the conditions of the reaction. |
| | (E)
A mixture of a solid polymer and reactable materials, the
latter combining with the solid polymer and polymerizing under the
conditions of the reaction. |
| | (F)
A mixture of a solid polymer and an ethylenic reactant. |
| | (G)
In (A) above any difference is sufficient to render the polymers
nonidentical, even if both are made of the same monomeric materials.
This includes, e.g., two polystyrenes of different density or crystallinity,
two diene rubbers of different Mooney viscosity, etc. |
| | (H)
In general, reactable materials (or monomer), as used herein
are distinguished from a resinifiable intermediate condensation
product by the fact that the former is a definite compound of certain composition
or structure, whereas the latter is the result of a reaction of
one or more nonresinous materials to yield a product which is not
a specific compound, but rather a complex mixture of products identifiable
only on the basis of the average properties of the whole product.
Complex nonresinous materials which are known to react only by first breaking
down to simple compounds are considered nonresinous materials (e.g., paraformaldehyde). |
| | (I)
Polymer forming system or polymer forming ingredients as used
throughout the schedule are generic terms and include (1) reactable
materials which form polymers, or (2) intermediate resinfication
condensation producers, polymers, or (3) ethylenic reactants which react
with the polymer. |
| | (J)
The resinous, resinifiable or polymerizable reaction product
of a plurality of nonresinous materials of any type is not included
here, but is considered a copolymer or co-condensation product and placed
in this class, as is appropriate. | |
SEE OR SEARCH THIS CLASS, SUBCLASS:
| 51, | for processes of preparing a cellular product only. |
| 52, | for all subject matter pertinent to a reticulated
product (e.g., processes, products, etc.). |
| 53, | through 55, for processes of treating, or for treated
cellular products, or for compositions containing a cellular product
and a treating agent, or processes of preparing such a composition. |
| 56, | through 77, for processes of preparing a cellular
product for cell forming compositions or processes of preparing. |
| 78, | through 81, for processes of preparing a cellular
product. |
| 82, | through 133, for processes of preparing a cellular
product in the presence of a stated ingredient, for cell forming compositions
containing a stated ingredient; or processes of preparing a cell
forming composition. |
| 134, | through 189, for cellular products, for processes
of preparing a cellular product in the absence of a stated ingredient,
for a cell forming composition devoid of a stated ingredient or
processes of preparing same, for processes of treating a cellular
product with a material which neither reacts with the cellular product
nor which is intended to form a composition therewith. |
SEE OR SEARCH CLASS:
| 106, | Compositions: Coating or Plastic, for a synthetic pigment, filler or aggregatecontaining
voids or cavities and, in particular,
subclass 409 wherein it is coated (encapsulated or dispersed) with
a stated material. |
| 216, | Etching a Substrate: Processes, for etching processes used in the manufacturing
of a porous or perforated article. |
| 264, | Plastic and Nonmetallic Article Shaping or Treating:
Processes,
subclasses 4.1+ for liquid encapsulation, e.g., microencapsulating
a liquid within a microcapsule wall derived from a synthetic polymer,
etc. However, if the core material is disclosed to be an expanding
(blowing) agent see Class 521, subclass 50, (4) Note for limitations
to those subclasses. |
| 427, | Coating Processes,
subclasses 213.3+ for solid encapsulation e.g., microencapsulating
a solid with a microcapsule wall derived from a synthetic polymer,
etc. However, if the core material is disclosed to be an expanding
(blowing) agent see Class 521, subclass 50, (4) Note for limitations
to those subclasses. |
| 428, | Stock Material or Miscellaneous Articles,
subclasses 402.2+ and 402.24 for microcapsuless with liquid and solid
cores respectively. However, if the core material is disclosed
to be an expanding (blowing) agent see Class 521, subclass 50, (4)
Note for a limitation to those subclasses. |
| 523, | Synthetic Resins or Natural Rubbers, in particular,
subclass 218 for a hollow nonsynthetic polymeric or polymeric
or hollow nonpolymeric material in admixture with a polymer of that
class. |
| 525, | Synthetic Resins and Natural Rubbers, for mixtures of solid polymers and mixtures of a
solid polymer and a polymer forming system which mixtures are not
cellular. |
| 588, | Hazardous or Toxic Waste Destruction or Containment,
subclass 255 for the use of a polymer, resin, or foam in the
containment of hazardous or toxic waste. |
|
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