US PATENT SUBCLASS 536 / 71
.~.~.~.~.~.~.~ Acetic acid utilized in pretreatment

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.~.~.~.~.~.~.~ Acetic acid utilized in pretreatment {2}
72  DF  .~.~.~.~.~.~.~>.~ Halogen containing compound utilized in process
73  DF  .~.~.~.~.~.~.~>.~ Sulfur containing compound utilized in pretreatment

DEFINITION

Classification: 536/71

(under subclass 70) Processes in which acetic acid is used in the pretreatment.

(1) Note. In these processes acetic acid is employed in the pretreatment in addition to the acetic acid or acetic anhydride used to form the acetate.