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. 04, 2017
Filed:
Mar. 23, 2016
Nissan North America, Inc., Franklin, TN (US);
Rameshwar Yadav, Novi, MI (US);
Nissan North America, Inc., Franklin, TN (US);
Abstract
A method of making a multi-acid polymer comprising: reacting a polymer precursor in sulfonyl fluoride or sulfonyl chloride form with anhydrous ammonia to obtain a sulfonamide, wherein the polymer precursor in sulfonyl fluoride or sulfonyl chloride form has a formula R—SOF or R—SOCl, respectively, with R being one of more units of the polymer precursor without sulfonyl fluoride or sulfonyl chloride, and wherein the sulfonamide has a formula R—SO—NH; and reacting the sulfonamide with a compound of a formula COOH—X-AGG under a mild base condition, wherein X is one of CHor N(CH)and AGG is an acid giving group, to form the multi-acid polymer having an imide base and more than two proton conducting groups.