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:
Sep. 17, 1991
Filed:
Dec. 21, 1989
Applicant:
Inventor:
Brian N Hendy, Middlesbrough, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528171 ; 528174 ; 528175 ; 528219 ; 374125 ;
Abstract
Sulphonated polyarylethers or thioethers are formed by polycondensing difunctional monomers having phenolic and/or thiophenolic and/or halogenic end groups in the presence of a dipolar aprotic solvent, at least to one of which monomers a sulphonic acid or a sulphonate salt is attached. The monomer(s) which the sulphonate group is attached is selected from monomers of formula I: