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:
Jul. 01, 2003
Filed:
Feb. 18, 2000
Applicant:
Inventors:
Morton H. Litt, University Heights, OH (US);
Robert F. Savinell, Solon, OH (US);
Jesse S. Wainright, Willoughby Hills, OH (US);
Yue Zhang, Cleveland, OH (US);
Assignee:
Case Western Reserve University, Cleveland, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G 7/310 ; C08G 6/926 ;
U.S. Cl.
CPC ...
C08G 7/310 ; C08G 6/926 ;
Abstract
Sulfonated polyimide polymers incorporating bulky monomers are disclosed. The polymers have a liquid crystalline structure and exhibit high conductivity, high water uptake and water stability over a range of relative humidities and temperatures. The polymers are particularly adapted for use as a polymer electrolyte membrane in fuel cells.