US PATENT SUBCLASS 554 / 176
.~.~.~ Metal containing contaminant removal (e.g., of colloidal elemental metal catalyst, of metal ions, etc.)

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ Fatty compounds having an acid moiety which contains the carbonyl of a carboxylic acid, salt, ester, or amide group bonded directly to one end of an acyclic chain of at least seven (7) uninterrupted carbons, wherein any additional carbonyl in the acid moiety is (1) part of an aldehyde or ketone group, (2) bonded directly to a noncarbon atom which is between the additional carbonyl and the chain, or (3) attached indirectly to the chain via ionic bonding {23}
175  DF  .~.~ Purification, recovery, deodorizing, decolorizing or color stabilizing {14}
176.~.~.~ Metal containing contaminant removal (e.g., of colloidal elemental metal catalyst, of metal ions, etc.)

DEFINITION

Classification: 554/176

(under subclass 175) Processes wherein a fatty compound is treated to remove a metal or metal compound therefrom.

(1) Note. This subclass contains patents wherein the claims specify the removal of a metal or a metal compound, as well as patents with broad claims wherein the disclosure is limited to the removal of a metal or a metal compound.