US PATENT SUBCLASS 536 / 72
.~.~.~.~.~.~.~.~ Halogen containing compound utilized in 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}
70  DF  .~.~.~.~.~.~ With pretreatment process {3}
71  DF  .~.~.~.~.~.~.~ Acetic acid utilized in pretreatment {2}
72.~.~.~.~.~.~.~.~ Halogen containing compound utilized in process

DEFINITION

Classification: 536/72

(under subclass 71) Processes in which a halogen containing compound is employed in the pretreatment of the cellulose or in the formation of the cellulose acetate.