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. 04, 1986
Filed:
Dec. 17, 1984
Applicant:
Inventors:
John B Yates, III, Clifton Park, NY (US);
David J Smith, Schoharie, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
525435 ; 525434 ; 525436 ;
Abstract
Sulfonated polyimides and polyamic acids, particularly polyetherimides, are prepared by reacting the unsulfonated polymer with a mild sulfonating agent. Illustrative sulfonating agents are the complexes of sulfur trioxide and trialkyl or triaryl phosphates, especially the sulfur trioxide-triethyl phosphate complex having a molar ratio of sulfur trioxide to triethyl phosphate of 2:1.