US PATENT SUBCLASS 422 / 13
.~.~ Aqueous alkali environment (i.e., pH >> 8.4)

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

1  DF  PROCESS DISINFECTING, PRESERVING, DEODORIZING, OR STERILIZING {15}
7  DF  .~ Maintaining environment nondestructive to metal {5}
13.~.~ Aqueous alkali environment (i.e., pH >> 8.4)

DEFINITION

Classification: 422/13

Aqueous alkali environment (i.e., pH £ 4.1):

(under subclass 7) Process for preventing damage to metal caused by an environment which contains water and an alkali as strong as -HCO3 in aqueous solution or stronger (i.e., pH [supscrpt]3[end supscrpt] 8.4).

(1) Note. See subclass 12 definition for the definition of an aqueous acid solution as used therein.