Concentration control system
United States Patent 2576253
US Patent References:
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Inventors:
Farrell, James K.
Keene, Paul A.
Publication Date:
11/27/1951
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Assignee:
ALLIED CHEM & DYE CORP
Primary Class:
137/93
Other Classes:
422/261, 324/443, 137/576, 68/17R, 422/114, 137/268
International Classes:
G05D21/02; G05D21/00
US Patent References:
1995318Dishwashing apparatus
2278769Cleaning machine
2370609Concentration cell and temperature compensator
2377363Solution concentration control system
2392026Consistency regulator