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:
Jun. 14, 1988
Filed:
Apr. 25, 1986
Applicant:
Inventors:
Stephen A Fischer, South Amboy, NJ (US);
Dinshaw F Bardoliwalla, Randolph, NJ (US);
Reuben H Grinstein, Denville, NJ (US);
Gary L Speenburgh, Parsippany, NJ (US);
Assignee:
Diamon Shamrock Chemical Co., Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560218 ;
Abstract
The monomer, trimethyl ammonium ethyl methacrylate methosulfate, is purified by passing same through a column of activated charcoal having a mean particle diameter of from about 0.5 mm to aboug 1.2 mm, the height to diameter ratio of the column being from about 3 to about 12 to 1. Monomer so treated can be polymerized to higher molecular weight polymers.