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:
Nov. 19, 2002
Filed:
Jul. 17, 2000
Applicant:
Inventors:
Gary F. Matz, Carnegie, PA (US);
Richard R. Lamar, Follansbee, WV (US);
Allan L. Melby, Cranberry Township, PA (US);
Nicholas F. Vozza, Burgettstown, PA (US);
Assignee:
Calgon Corporation, Naperville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 7/02 ; C08E 1/230 ; E21B 3/313 ; D21H 1/100 ;
U.S. Cl.
CPC ...
C09K 7/02 ; C08E 1/230 ; E21B 3/313 ; D21H 1/100 ;
Abstract
Novel branched or crosslinked polymers containing (meth)acrylamidopropyltrimethyl ammonium halide; (meth)acrylic acid or 2-(meth)acrylamido-2-methylpropane sulfonic acid; methylene bis-acryamide and the like; and a C -C alkyl (meth) acrylate and the use thereof in papermaking, subterranean well drilling and well cementing operations is disclosed.