US PATENT SUBCLASS 604 / 374
.~.~.~ Cellulose or cellulosic materials

Current as of: June, 1999
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604 /   HD   SURGERY

317  DF  MEANS AND METHODS FOR COLLECTING BODY FLUIDS OR WASTE MATERIAL (E.G., RECEPTACLES, ETC.) {5}
358  DF  .~ Absorbent pad for external or internal application and supports therefor (e.g., catamenial devices, diapers, etc.) {13}
367  DF  .~.~ Containing particular materials, fibers, or particles {6}
374.~.~.~ Cellulose or cellulosic materials {2}
375  DF  .~.~.~.~> With additional chemical modifications (e.g., paper, chemical pulp, rayon, etc.) {1}
377  DF  .~.~.~.~> Cotton or derivative thereof

DEFINITION

Classification: 604/374

Cellulose or cellulosic material:

(under subclass 367) Subject matter wherein significance is attributed to a layer of collecting means which is composed of material derived from living plants in the form of polysaccharides.

(1) Note. Patents in this subclass disclose wood pulp fibers or sheets. For the purpose of this subclass wood pulp is considered to be mechanically prepared wood pulp unless specifically claimed or disclosed as having additional chemical processing such as sulfite treatment, etc., in which case the patent would be classified in subclasses 375+.

SEE OR SEARCH CLASS

162, Paper Making and Fiber Liberation,

1+, for processes of liberating natural cellulosic fibers.

241, Solid Material Communition or Disintegration,

21, for processes of making wood pulp.