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:
Mar. 16, 1976
Filed:
Jan. 15, 1975
Applicant:
Inventors:
David H Clemens, Willow Grove, PA (US);
Raymond J Lange, Wheelersburg, OH (US);
Assignee:
Rohm and Haas Company, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ;
Abstract
Resins containing sulfonic acid functionality may be prepared by reacting a chloromethylated polymer matrix with thiourea and then oxidizing the resulting isothiouronium salt to the sulfonic acid in the presence of hydrogen peroxide, either directly or with the intermediate isolation of the thiol.