US PATENT SUBCLASS 162 / 160
.~.~ Preservative or antioxidant


Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

100  DF  PROCESSES AND PRODUCTS {31}
158  DF  .~ Non-fiber additive {16}
160.~.~ Preservative or antioxidant {1}
161  DF  .~.~.~> Biocidal


DEFINITION

Classification: 162/160

(under subclass 158) Processes and products which include a nonfiber additive which acts as a preservative for the paper or is an agent for preventing oxidation.

(1) Note. Processes and products which preserve paper merely by exclusion of the atmosphere are not included, such processes and products are usually classified on the basis of the identity of the nonfiber additive.

SEE OR SEARCH CLASS

252, Compositions,

380+, for preservative agents.

426, Foods and Edible Material: Processes, Compositions, and Products,

138, 178+, for food products having antioxidants and subclass 228, for a food antioxidant, per se.