US PATENT SUBCLASS 560 / 5
.~.~ Hydrophenanthrene in acid moiety

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}
5.~.~ Hydrophenanthrene in acid moiety {2}
6  DF  .~.~.~> Polycyclo ring system having the hydrophenanthrene and at least one additional ring as cyclos
7  DF  .~.~.~> 1,4a-Dimethylhydrophenanthrene-1- carboxylic acid

DEFINITION

Classification: 560/5

Hydrophenanthrene in acid moiety:

(under subclass 1) Compounds wherein the acid radical contains a hydrophenanthrene nucleus not provided for above.

(1) Note. Patents are placed here when directed to compounds, wherein the acid radical is that of a free natural resin acid of known chemical structure which contains the hydrophenanthrene nucleus.

(2) Note. This subclass contains, for example: [figure] [figure]

SEE OR SEARCH CLASS

530, Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof,

200+, for esters of natural resin acids obtained by treatment of the natural resin and wherein the esters are not separated as single compounds of known chemical structure. See particularly subclasses 215, 216, 217, and 218.