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:
Feb. 12, 1985
Filed:
Nov. 03, 1982
David J Blundell, Welwyn Garden City, GB;
Brian P Griffin, St. Albans, GB;
William A MacDonald, Ware, GB;
Imperial Chemical Industries PLC, London, GB;
Abstract
An anisotropic-melt-forming polymer having improved stiffness retention at elevated temperatures comprising residues selected from residues (A) of dihydric phenols, aromatic dicarboxylic acids, hydroxyaromatic acids, aromatic diamines, aminophenols and aminoaromatic acids wherein at least 40 mole % of the residues (A) have their chain extending bonds in either coaxial or parallel and oppositely directed relationship and sufficient of non-linear residues (B) selected from at least one of: ##STR1## to give a polymer having an improved retention of stiffness at elevated temperature compared with an otherwise similar polymer not containing said residues (B).