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. 31, 1990
Filed:
May. 04, 1989
Applicant:
Inventors:
William B Marshall, Midland, MI (US);
James R Pribish, Midland, MI (US);
James L Brewbaker, Midland, MI (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528193 ; 528176 ; 528271 ; 528272 ; 525390 ; 525397 ; 525418 ; 525450 ;
Abstract
The invention relates to a class of copolyesters which display optical anisotropy in the molten state and to the shaped articles, fibers and films obtained from the optically anisotropic melts. the copolyesters comprise recurring structural units (a) independently each occurrence selected from the group consisting of Formulas I and II; and recurring structural units (b) independently each occurrence selected from the group consisting of Formula III; ##STR1## wherein R independently each occurrence is a chemically inert substituent.