US PATENT SUBCLASS 521 / 78
.~.~ Preparing a cellular product by spraying a solid polymer containing material

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
50  DF  .~ CELLULAR PRODUCTS OR PROCESSES OF PREPARING A CELLULAR PRODUCT, E.G., FOAMS, PORES, CHANNELS, ETC. {27}
78.~.~ Preparing a cellular product by spraying a solid polymer containing material

DEFINITION

Classification: 521/78

Preparing a cellular product by spraying a solid polymer containing material:

(under subclass 50) Subject matter drawn to processes of cell formation wherein cell formation is achieved or initiated by a step of projecting into a gaseous atmosphere in a manner whereby temporary or permanent solid or liquid particles are formed (1) a solid polymer in liquid state (e.g., molten, dissolved, etc.), or (2) solid polymer-forming materials.

(1) Note. Included in this subclass but not limited thereto are processes of taking solid particles and dissolving same and spraying, as well as melting of solid particles and spraying.

(2) Note. Processes involving a projecting step wherein cell formation and projecting are incidental to each other, e.g., no cell formation initiated or achieved during the projecting step, etc. are not proper for this subclass.

(3) Note. This subclass does not provide for compositions which are to be used in preparing cellular product even if claimed as being capable of preparing a cellular product by spraying or for cellular products which are the result of a spraying procedure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

56+, for processes of preparing a cellular product wherein a solid particle is expanded and retains its individual particle identity or wherein individual particles are expanded and coalesce to form an expanded product.

65+, for processes of spraying or projecting an aqueous emulsion, dispersion, or latex.