US PATENT SUBCLASS 536 / 40
.~.~.~.~.~.~.~ Recovery from photographic film

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  DF  .~.~.~.~.~.~ Subsequent treatment process {4}
40.~.~.~.~.~.~.~ Recovery from photographic film

DEFINITION

Classification: 536/40

(under subclass 38) Processes in which nitrated cellulose is recovered from photos:graphic film.