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:
Sep. 26, 1978
Filed:
Jun. 13, 1977
Applicant:
Inventor:
Edgar W Sawyer, Jr, Hagerstown, MD (US);
Assignee:
International Telephone and Telegraph Corp., Nutley, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02B / ;
U.S. Cl.
CPC ...
210 27 ; 210 28 ; 210 29 ; 210 40 ;
Abstract
Treating water with various grades of attapulgite clay and sepiolite using contacting or percolation techniques removes substances not removable by standard water purification methods under many conditions. Substances such as pesticides, toxins, hormones, heavy metal cations and viruses are removed from water by adsorption upon the clay surface. When contacting is employed, the clay containing the adsorbed substances is subsequently removed by sedimentation or filtration. The clays can be regenerated by appropriate chemical or thermal techniques.