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. 19, 1991
Filed:
Dec. 16, 1988
Applicant:
Inventors:
Hyman R Lubowitz, Rolling Hills Estates, CA (US);
Clyde H Sheppard, Bellevue, WA (US);
Ronald R Stephenson, Kirkland, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
428378 ; 428394 ; 524 83 ; 524 89 ; 524494 ; 525420 ; 525435 ;
Abstract
High thermal stabilities are achievable in linear or multidimensional sulfone, solvent resistant oligomers by incorporating oxazole, thiazole, or imidazole linkages into the oligomer backbone. Blended oligomers of crosslinking oligomers and noncrosslinking compatible polymers are also described. The oligomers include residues of four-functional compounds of the formula: ##STR1## (or isomers thereof) wherein M=--CO--, --S--, --O--, --SO.sub.2 -- or --(CF.sub.3).sub.2 C--; and