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. 29, 1992
Filed:
Sep. 04, 1990
Applicant:
Inventors:
Jerry A Peik, San Diego, CA (US);
Suzanna M Steenbergen, Alpine, CA (US);
George T Veeder, San Diego, CA (US);
Assignee:
Merck & Co., Inc., Rahway, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C07G / ; C12P / ; C12N / ;
U.S. Cl.
CPC ...
536123 ; 536 551 ; 435101 ; 4352521 ; 435910 ; 252-8551 ;
Abstract
The new heteropolysaccharide S-657, prepared by fermentation of a new strain of Xanthomonas campestris, ATCC 53159, has valuable properties as a thickening, suspending and stabilizing agent in aqueous solutions and is especially valuable for use in well treating fluids. Heteropolysaccharide S-657 is composed principally of carbohydrate, about 12% protein and about 7% (calculated as O-acetyl) acyl groups, the carbohydrate portion containing about 19% glucuronic acid, and the neutral sugars rhamnose and glucose in the approximate molar ratio of 2:1.