The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1977
Filed:
Oct. 31, 1975
Applicant:
Inventors:
Donald F Jacques, Cornwells Heights, PA (US);
K Robert Lange, Huntingdon Valley, PA (US);
Assignee:
Betz Laboratories, Inc., Trevose, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02C / ;
U.S. Cl.
CPC ...
210 28 ; 210 / ; 210 50 ; 210 51 ; 210D / ; 423 55 ; 423607 ;
Abstract
A method for reducing the residual chromate level in effluent waters comprising catalytic reduction of the chromate ion by hydrogen to the trivalent chromium state and removal of the chromium by passage through a cation exchange resin column or by base precipitation in a settling pond.