US PATENT SUBCLASS 134 / 26
.~ Using sequentially applied treating agents

Current as of: June, 1999
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134 /   HD   CLEANING AND LIQUID CONTACT WITH SOLIDS

*  DD  PROCESSES {23}
26.~ Using sequentially applied treating agents {4}
27  DF  .~.~> One a neutralizer for another
28  DF  .~.~> One an acid or an acid salt
29  DF  .~.~> One a soap or an alkaline agent
30  DF  .~.~> Including steam, gaseous agent or temperature feature

DEFINITION

Classification: 134/26

(under the class definition) Processes in which two or more treating agents are sequentially applied to the work.

(1) Note. One of the agents may be for the purpose of drying work.

(2) Note. Neither the application of mixed treating fluids to the work, nor the simultaneous application of plural treating fluids to the work is in this or the indented subclasses, see particularly subclass 36.

SEE OR SEARCH THIS CLASS, SUBCLASS:

4, where a solidified or hardened coating is formed on the work for subsequent removal.

6+, where a treating agent is in solid form, when it contacts

the work, even though subsequently dissolved. 10+, for the regeneration, purification, recovery or separation of treating agents when not on the work.

19+, where products of combustion contact the work.

36, see also note (2), for plural separately fed and simultaneously applied treating agents and processes which involve premixing of plural treating agents.

61, 84+, and 94+, for apparatus for applying different fluids sequentially.