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. 29, 1993
Filed:
Oct. 09, 1991
Applicant:
Inventor:
Robert P Kreh, Jessup, MD (US);
Assignee:
W. R. Grace & Co.-Conn., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210698 ; 210699 ; 252180 ; 422 14 ;
Abstract
A method for treating an aqueous system which contains solid particles of iron (III) oxide is disclosed which comprises adding to the system catechol, hydroquinone, their water soluble salts, and mixtures thereof in an amount effective to disperse or suspend iron (III) oxide particles. The aqueous system should have a pH greater than 7 and have low to moderate hardness.
Kreh, Robert. (1993). Dispersion of iron (iii) oxides using certain dihydroxaromatic compounds (U.S. Patent No. 5223146). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5223146
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile