US PATENT SUBCLASS 528 / 308.2
.~.~.~.~.~ Physically after-treated solid polymer

Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
271  DF  .~ FROM CARBOXYLIC ACID OR DERIVATIVE THEREOF {10}
272  DF  .~.~ From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof {15}
308  DF  .~.~.~ Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid {2}
308.1  DF  .~.~.~.~ Polyethylene Terephthalate per se {2}
308.2.~.~.~.~.~ Physically after-treated solid polymer

DEFINITION

Classification: 528/308.2

Physically after-treated solid polymer:

(under subclass 308.1) Subject matter wherein the polymer claimed has been treated by physical means, such as stretching, heating, cutting, spinning, etc., in order to change the physical properties of the polymer.

(1) Note. The specification may be read in conjunction with the claims to determine whether the polymer has been physically treated within the meaning of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

480+, for processes of treating a polymer by chemical means in order to change physical, but not chemical properties of the polymer and for processes of chemically modifying polymers solely by physical processes in the absence of a chemical treating agent.

SEE OR SEARCH CLASS

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, appropriate subclasses, for processes for preparation of a polymer wherein a significant molding step, such as spinning into a specifically named bath, is recited and note especially

340+, for processes in which preformed, shaped or solid articles are subjected to treatment, including all procedures in which the chemical or physical properties or characteristics of a work piece are modified or controlled by other than mechanically shaping by contacting the work with a solid shaping member.

525, Synthetic Resins or Natural Rubbers, 50+, for processes of chemically modifying solid polymers in the presence of a chemical treating agent or reactant or products thereof.