US PATENT SUBCLASS 536 / 37
.~.~.~.~.~.~ With pretreatment process

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
37.~.~.~.~.~.~ With pretreatment process

DEFINITION

Classification: 536/37

(under subclass 35) Processes in which cellulose undergoes a physical or chemical treatment prior to the nitration step.