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:
Dec. 16, 1986
Filed:
Sep. 11, 1985
Applicant:
Inventors:
Eli Salem, Deal, NJ (US);
Robert Kunin, Yardley, PA (US);
Assignee:
The Graver Company, Union, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ; B01D / ;
U.S. Cl.
CPC ...
210668 ; 210757 ; 210763 ; 210777 ;
Abstract
A layer of precoat filter aid material including powdered activated carbon removes oxygen and impurities from a liquid having hydrazine added thereto. Oxygen concentrations may be reduced to parts per billion concentrations. Suspended solids can be removed by the precoat layer, and if the precoat layer includes an active particulate material, either as a component of the precoat layer or as an underlayer, the concentration of impurities and dissolved solids in the liquid can also be reduced.