US PATENT SUBCLASS 536 / 76
.~.~.~.~.~.~ 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}
56  DF  .~.~ Cellulose or derivative {4}
58  DF  .~.~.~ Esters {3}
63  DF  .~.~.~.~ Carboxylic acid esters {5}
69  DF  .~.~.~.~.~ Acetates {3}
76.~.~.~.~.~.~ Subsequent treatment process {6}
77  DF  .~.~.~.~.~.~.~> Comminuting or centrifuging
78  DF  .~.~.~.~.~.~.~> Recovery from photographic film
79  DF  .~.~.~.~.~.~.~> Corrosiveness reduced
80  DF  .~.~.~.~.~.~.~> Viscosity or degree of polymerization changed (e.g., degrading, cross linking, etc.)
81  DF  .~.~.~.~.~.~.~> Stabilizing
82  DF  .~.~.~.~.~.~.~> Halogen containing compound utilized in process

DEFINITION

Classification: 536/76

(under subclass 69) Processes in which cellulose acetates are purified, recovered, separated, altered physically; or treated chemically wherein the primary intent is merely to modify a property of the cellulose acetate.