US PATENT SUBCLASS 8 / 94.19 R
.~ Tanning

Current as of: June, 1999
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8 /   HD   BLEACHING AND DYEING; FLUID TREATMENT AND CHEMICAL MODIFICATION OF TEXTILES AND FIBERS

94.1 R  DF  TREATMENT OF HIDES, SKINS, FEATHERS AND ANIMAL TISSUES {9}
94.19 R.~ Tanning {8}
94.2  DF  .~.~> With subsequent treatment {1}
94.24  DF  .~.~> With aldehyde-aromatic condensation product
94.25  DF  .~.~> With heavy metal compound {3}
94.29  DF  .~.~> With aluminum compound {1}
94.31  DF  .~.~> With cellulose liberation liquor
94.32  DF  .~.~> With vegetable extract
94.33  DF  .~.~> With organic material
94.19 C  DF  .~.~> Resin condensation in situ in leather

Unofficial Alpha Subclasses: R C

DEFINITION

Classification: 8/94.19

(under subclass 94.1) Processes, directed to the tanning of hides and skins to produce leather.

(1) Note. The term "tanning" as used means the chemical reaction of the protein of the hide or skin with another material to produce an insoluble compound, includes all such reaction such as with alum, commonly known as "tawing".

SEE OR SEARCH THIS CLASS, SUBCLASS:

404+, for tanning combined with dyeing.

SEE OR SEARCH CLASS

560, Organic Compounds,

68, and 69 for tanning materials which are new chemical compounds, reaction products or extracts.