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. 20, 1994
Filed:
Feb. 02, 1993
Applicant:
Inventors:
Graham T Brown, Wirral, GB;
Theo J Osinga, An Cadier en Keer, NL;
Michael J Parkingston, Wirral, GB;
Andrew T Steel, Wirral, GB;
Assignee:
Unilever Patent Holdings B.V., Rotterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ; C11D / ;
U.S. Cl.
CPC ...
25217425 ; 252174 ;
Abstract
Aluminosilicates in the form of P type zeolites are used as detergency builders and have a silicon to aluminium ratio not greater than 1.33, preferably above 0.9. These zeolites will usually have a calcium binding capacity of at least 150 mg CaO per gram of anhydrous aluminosilicate. A preferred form of the zeolite P has a silicon to aluminium ratio up to 1.15, and preferably above 0.9, with a tetragonally distorted cubic crystal structure. A process of the preparation of these zeolite P builders is described.