US PATENT SUBCLASS 428 / 480
.~ Of polyester (e.g., alkyd, etc.)

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

411.1  DF  COMPOSITE (NONSTRUCTURAL LAMINATE) {25}
480.~ Of polyester (e.g., alkyd, etc.) {3}
481  DF  .~.~> Next to cellulosic
482  DF  .~.~> Of cross-linked polyester
483  DF  .~.~> Next to addition polymer from unsaturated monomers

DEFINITION

Classification: 428/480

(under subclass 411.1) Product in which a layer comprises a polymeric compound containing ester groups through which the monomers are linearly linked to each other.

(1) Note. To be considered polyester*, the chain of units must be attached to each other through ester linkage, such as the product formed by esterification of a polyhydric alcohol with a polybasic acid or the polymeric self-esterification of a hydroxy acid. A polymer which has multiester groups and whose units are not linked through these ester groups but by

means of some other method (e.g., reaction of double bonds) is not considered polyester. thus, a patent claiming a polyvinyl acetate or a poly methyl acrylate laminate will be found in subclasses 500+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26, for an artificial flower or flower petal which may be made of polyester.

395, for a rod*, strand*, filament* or fiber* having a coating thereon or being structurally defined and made of polyester.

430, and 458, for a laminate including a layer of polyester next to quartz* or glass*, or metal* respectively. 500+, and especially 514, 520 and 522 for a laminate of an addition polymer from unsaturated monomers which is an ester; and see (1) Note, above.

SEE OR SEARCH CLASS

442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.),

164, for a coated or impregnated polyester fiber fabric and subclass 395 for a fabric with a preformed polyester sheet or film.