US PATENT SUBCLASS 424 / 78.17
.~ Aftertreated polymer (e.g., grafting, blocking, etc.)

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

Internet Version by PATENTEC © 1999      Terms of Use


424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

78.08  DF  SOLID SYNTHETIC ORGANIC POLYMER AS DESIGNATED ORGANIC ACTIVE INGREDIENT (DOAI) {6}
78.17.~ Aftertreated polymer (e.g., grafting, blocking, etc.) {2}
78.18  DF  .~.~> Polymer derived from ethylenic monomers only {2}
78.3  DF  .~.~> Heterocyclic monomer

DEFINITION

Classification: 424/78.17

Aftertreated polymer (e.g., grafting, blocking, etc.):

(under subclass 78.08) Subject matter wherein the solid synthetic polymer is subjected to an aftertreatment process wherein, though the most common process is chemical in nature, other aftertreatment processes likewise are proper herein; e.g., radiation, physical, heat, etc.; the one requirement being that a bond-breaking process occurs within the polymer molecule.

(1) Note. The chemical aftertreatment of a solid synthetic organic polymer may be to remove or add a group or element or a combination of both procedures. The following examples are given to illustrate the type of polymers which may be found here: (a) a therapeutic preparation for treating encephalomyelitis contained an active polymer which was derived from the N-carboxy-anhydrides of tyrosine, alanine, gamma-benzyl glutamate and epsilon-N-trifluoroace-tyllysine followed by the deblocking of the gamma carboxyl group of the glutamic acid and followed further by the removal of the trifluoroacetyl group from lysine; (b) an iron composition suitable for parenteral injection prepared by reacting ferric chloride with a polymer which is the reaction product of a hydroxy carboxylic acid, a polyhydric alcohol and a diepoxide (c) A germicidal complex derived from the reaction of iodine with a polymer derived from the reaction of sucrose and epichlorohydrin, etc.

(2) Note. The starting solid synthetic polymer may be subjected to a number of aftertreating steps the sequence or numbers of which will not affect classification. The important criteria is that every reaction be considered in going from the starting solid polymer to the final product. This is consistent with the rules set out in the Class 520 Series.

SEE OR SEARCH CLASS

522, Synthetic Resins or Natural Rubbers, for the process of treating a solid polymer utilizing wave energy.

525, Synthetic Resins or Natural Rubbers, appropriate subclasses for the aftertreatment of solid synthetic organic polymers.

526, Synthetic Resins or Natural Rubbers, for the preparations of solid synthetic polymers derived from ethylenic monomers only; e.g., acrylic acid, etc. 527, Synthetic Resins or Natural Rubbers, for the preparation of solid synthetic polymers derived from the reaction between a natural product and other chemical intermediates; e.g., a carbohydrate and polyisocyanate, a protein and an ethylenic reactant, etc.

528, Synthetic Resins or Natural Rubbers,

1+, for the preparation of a solid synthetic polymer derived from at least one saturated reactant; e.g., toluene diisocyanate and polyethylene glycol, etc.; subclasses 480+ for treating a solid polymer merely with heat to affect a chemical change and in the absence of a chemical reactant.