US PATENT SUBCLASS 536 / 38
.~.~.~.~.~.~ Subsequent treatment process

Current as of: June, 1999
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536 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
18.7  DF  .~.~ Nitrogen containing {13}
30  DF  .~.~.~ Cellulose derivatives {3}
32  DF  .~.~.~.~ Esters {3}
35  DF  .~.~.~.~.~ Nitrates {3}
38.~.~.~.~.~.~ Subsequent treatment process {4}
39  DF  .~.~.~.~.~.~.~> Comminuting
40  DF  .~.~.~.~.~.~.~> Recovery from photographic film
41  DF  .~.~.~.~.~.~.~> Viscosity or degree of polymerization changed (e.g., degrading, cross linking, etc.)
42  DF  .~.~.~.~.~.~.~> Stabilizing

DEFINITION

Classification: 536/38

(under subclass 35) Processes in which cellulose nitrate is purified, recovered, separated, altered physically; or treated chemically wherein the primary intent is merely to modify a property of cellulose nitrate.

(1) Note. The processes herein may combine producing the nitrated cellulose with a subsequent treatment or may merely treat already formed cellulose nitrate.