US PATENT SUBCLASS 34 / 404-- .~.~.~ With addition of treating agent

US PATENT SUBCLASS 34 / 404
.~.~.~ With addition of treating agent

Current as of: June, 1999
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34 /	HD	DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

282	DF	PROCESS {24}
402	DF	.~ Gas or vapor pressure varies during treatment {2}
403	DF	.~.~ Including subatmospheric pressure {1}
404		.~.~.~ With addition of treating agent

DEFINITION

Classification: 34/404

With addition of treating agent:

(under subclass 403) Process wherein a substance is applied to the treated material or the gas or vapor contacting the material for regulating or promoting the treating material.

(1) Note. Examples of such treating agents would be steam, inert gases, liquids that are evaporated during treating, or any combination of such agents.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329+, for the application of a liquid or solid for the express purpose of drying.

SEE OR SEARCH CLASS

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, for a chemical reaction between the treated material and the treating agent.