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:
Feb. 15, 1977
Filed:
Mar. 21, 1974
Applicant:
Inventors:
James D Watson, Houston, TX (US);
James R Stanford, Sugar Land, TX (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02B / ;
U.S. Cl.
CPC ...
252 / ; 210 58 ; 252 / ; 252180 ; 2604 / ;
Abstract
Copolymers of acrylic acid and methyl acrylate are prepared which are stable against precipitation in waters containing calcium even at a pH of 10 and at elevated temperatures and are especially useful in inhibiting the deposition of calcium from waters containing calcium, in underground formations, in cooling waters and other processes where it is desirable to prevent calcium deposits on metal surfaces or other surfaces in contact with water containing calcium.