US PATENT SUBCLASS 560 / 69
.~.~.~.~.~.~.~ Extraction from bark or vegetable material

Current as of: June, 1999
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560 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {17}
1  DF  .~ Carboxylic acid esters {14}
8  DF  .~.~ Aromatic acid moiety {9}
55  DF  .~.~.~ Oxy in acid moiety {7}
64  DF  .~.~.~.~ Ester function attached directly to a ring {5}
67  DF  .~.~.~.~.~ Phenolic hydroxy or metallate {4}
68  DF  .~.~.~.~.~.~ Tannins and reaction products thereof {1}
69.~.~.~.~.~.~.~ Extraction from bark or vegetable material

DEFINITION

Classification: 560/69

Extraction from bark or vegetable material:

(under subclass 68) Processes which are directed to or include the treatment of bark, shell galls, or other vegetable material to remove tannins therefrom.