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:
Jun. 09, 1992
Filed:
Mar. 06, 1991
Applicant:
Inventor:
Joel B Christian, Towanda, PA (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210714 ; 210912 ; 210724 ; 210725 ; 210727 ; 210717 ;
Abstract
A method for treating wastewater having a pH of between about 0.1 and 14 and containing dissolved heavy metals, in which a substantial portion of the heavy metals is precipitated as crystallized solids embedded within an insoluble monoclinic calcium sulfate crystal to produce a purified effluent having a pH of between 8 and 9.