US PATENT SUBCLASS 428 / 442
.~.~.~ Ester, halide or nitrile of addition polymer

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
426  DF  .~ Of quartz or glass {9}
441  DF  .~.~ Next to addition polymer from unsaturated monomers {1}
442.~.~.~ Ester, halide or nitrile of addition polymer

DEFINITION

Classification: 428/442

(under subclass 441) Product in which the addition polymer is an ester, halide or nitrile.

(1) Note. The addition polymer may be derived from monomers which include esters, halides or nitriles or the addition polymer may be treated to introduce ester, halide or nitrile radicals.

(2) Note. The ester moieties are pendant, i.e., in a long chain polymer, the ester groups branch out from the main chain and the chain is not linked through a plurality of ester linkages. If the chain were linked through the ester groups, as in alkyd or polyethylene terephthalate, a patent claiming such laminate would be placed in subclass 430 or 431.

(3) Note. Patents claiming partially hydrolyzed polyvinyl ester next to glass will be placed here. If, however, the ester is completely hydrolyzed the patent will be placed in subclass 441 unless an acetal if formed therefrom, in which latter case the patent would be placed in subclass 437. The word "hydrolyzed", without qualification in a patent will be deemed to mean completely hydrolyzed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

421, for glass next to a fluorinated addition polymer of unsaturated monomers.

430, for glass next to a layer of units linked together through the ester moities; and see (2) Note above. 437, for glass next to an acetal of hydrolyzed polyvinyl alcohol; and see (3) Note above.

441, for glass next to a completely hydrolyzed polyvinyl

ester; and see (3) Note above.