US PATENT SUBCLASS 521 / 82
.~.~ Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


521 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
82.~.~ Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same {14}
83  DF  .~.~.~> Ingredient is asphaltic, bituminous, or water settable inorganic material, e.g., cement, plaster of Paris, etc.
84.1  DF  .~.~.~> Ingredient is protein, carbohydrate, or natural resin
85  DF  .~.~.~> Ingredient contains a boron or phosphorus atom
86  DF  .~.~.~> Ingredient is organic silicon compound
87  DF  .~.~.~> Ingredient is aldehyde or ketone
88  DF  .~.~.~> Ingredient is ether, alcohol, or inorganic alcoholate, e.g., phenol, etc.
89  DF  .~.~.~> Ingredient contains a sulfur atom
90  DF  .~.~.~> Ingredient is a heterocyclic compound
91  DF  .~.~.~> Ingredient contains a silicon atom
92  DF  .~.~.~> Ingredient contains a metal atom {1}
94  DF  .~.~.~> Ingredient is a nitrogen containing compound {1}
96  DF  .~.~.~> Ingredient contains an -O-O- group
97  DF  .~.~.~> Ingredient contains a carbon atom double-bonded to oxygen, e.g., carbon dioxide, carboxylic acid, etc.
98  DF  .~.~.~> Ingredient contains only C and H atoms, only C and halogen atoms, or only C, H, and halogen atoms

DEFINITION

Classification: 521/82

Process of forming a cellular product subsequent to solid polymer formation in the presence of a stated ingredient, noncellular composition capable of forming a cellular product and containing a stated ingredient, or process of preparing same:

(under subclass 50) Subject matter wherein cells are formed subsequent to the formation of a solid polymer and wherein the cell formation is performed in the presence of a stated ingredient.

(1) Note. This subclass provides (1) for processes of forming cellular products in the presence of a stated ingredient; or (2) for solid polymer containing compositions which will form cells and which contain a stated ingredient; or (3) for processes of preparing a polymer containing composition which contains a stated ingredient and wherein said composition can be made into a cell containing product.

(2) 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.), (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.

(3) Note. This subclass relates to both nonreactive and reactive materials. In this regard it is to be noted that the use of the term "stated ingredient" is in the context of materials present during the cell-forming operation and which operation is subsequent to solid polymer formation; hence it is proper to regard a cross-linking agent or a system of additional polymer forming ingredient as being "stated ingredients" when such materials are present and are in admixture with a solid polymer and cell formation is occurring.

(4) Note. When a material is consumed prior to the cell-forming operation, such material is not to be regarded as a stated ingredient. However, when a material is added to a solid polymer with the intent that such material be present in some degree during the cell-forming operation then such a material is to be regarded as a stated ingredient.

(5) Note. An exception to the stated ingredient rule is that a solid polymer proper for this Class 520 Series is not to be regarded as a "stated ingredient" for another solid polymer.

(6) Note. For purposes of this subclass a polymer derived from only ethylenically unsaturated monomers is presumed to be a solid polymer unless contradicted by the patent specification.

(7) Note. Materials which are present during the cell-forming operation but which are known to form solid polymers apart from the solid polymer originally present are regarded as being "stated ingredients" for purposes of this subclass.

(8) Note. Carbohydrates, proteins, fats, natural resins, asphaltic, bituminous materials are always regarded as being "stated ingredients" for purposes of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

76, for processes of preparing cellular materials which may involve the use of a stated ingredient containing a coating of a solid synthetic polymer.

77, for cell forming processes utilizing a solid polymer decomposable so as to either form a cellular product of itself or to assist in the preparation of cells of an additional solid polymer.

99+, for any other "stated ingredient" present; it is highly desirable that cross-references be placed herein on the basis of such other "stated ingredients".

134+, for a process of preparing a cellular product involving two or more solid polymers and in the absence of a "stated ingredient".

143, through 189, for processes of preparing a cellular product in the absence of a "stated ingredient".