US PATENT SUBCLASS 523 / 309-- .~.~.~ With removal or comminution of material at a temperature greater than 250 degrees C or less than 0 degrees C, e.g., freeze drying, etc.

US PATENT SUBCLASS 523 / 309
.~.~.~ With removal or comminution of material at a temperature greater than 250 degrees C or less than 0 degrees C, e.g., freeze drying, etc.

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

Internet Version by PATENTEC © 1999 Terms of Use

523 /	HD	SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*	DD	SYNTHETIC RESINS (Class 520, Subclass 1) {1}
1	DF	.~ PROCESSES OF PREPARING A DESIRED OR INTENTIONAL COMPOSITION OF AT LEAST ONE NONREACTANT MATERIAL AND AT LEAST ONE SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT, OR PRODUCT THEREOF {71}
307	DF	.~.~ Utilizing a temperature greater than 250 degrees C (482 degrees F) or less than 0 degrees C {1}
309		.~.~.~ With removal or comminution of material at a temperature greater than 250 degrees C or less than 0 degrees C, e.g., freeze drying, etc.

DEFINITION

Classification: 523/309

With removal or communition of material at a temperature greater than 250 deg.C or less than 0 deg., e.g., freeze drying, etc.:

(under subclass 307) Process wherein there is a step of removing a material from the system or in particulating a material, and wherein the removal or particulation step must be at the specified temperature.

(1) Note. Included herein are latex concentration processes and freeze drying processes, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

340, for removal of material at reduced pressure and temperature greater than 32 deg.F and less than 428 deg.Φ, ϵ.&ggr;., ϖαχ&ugr;&ugr;µ σ&tgr;ρι&pgr;&pgr;ι&ngr;&ggr;, ϵ&tgr;χ.