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:
Mar. 02, 1993
Filed:
Feb. 21, 1991
Applicant:
Inventors:
Assignee:
Ausidet S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ; C11D / ; C11D / ;
U.S. Cl.
CPC ...
2523131 ; 2523152 ; 252173 ; 25217417 ; 25217421 ; 25217425 ;
Abstract
Aqueous suspensions of a silica-based inorganic material insoluble in water and in a finely subdivided form, stabilized with at least one organic polymeric compound containing hydroxylic groups and with an ammonium or phosphonium quaternary compound of the formula: ##STR1## wherein: B is nitrogen or phosphorus; A is either mono or polyvalent anion, while A.sub.1.sup.- is SO.sub.3.sup.- or COO.sup.-.