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:
Nov. 08, 1983
Filed:
Dec. 07, 1981
Applicant:
Inventors:
Brian P Griffin, St. Albans, GB;
William A MacDonald, Ware, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528190 ; 528364 ; 528422 ; 528425 ; 528125 ; 528126 ; 528128 ; 528172 ; 528173 ; 528183 ; 528184 ; 528185 ; 528191 ; 528193 ; 528194 ; 528195 ; 528206 ; 528208 ; 528209 ; 528210 ; 528212 ; 528220 ; 528229 ; 528271 ; 528337 ; 528339 ; 528340 ; 528344 ; 528348 ; 528360 ; 528361 ; 528363 ;
Abstract
A melt-processable aromatic polyester anhydride characterized in that from 5 to 80% of the units linking the reactant residues in the polymer chain have the formula: ##STR1## the remaining linkages between the residues of the reactants being of the formula: ##STR2## optionally together with linkages of the formula: ##STR3## substantially all of said remaining linkages being disposed in coaxial or parallel and oppositely directed manner with respect to the residues to which they are linked, the polyester anhydride having a solubility of less than 5% by weight in dimethyl sulphoxide at room temperature.