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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.:

US 5378799 B1

PDFFull Text
Date of Patent:
Jan. 03, 1995

Filed:

Sep. 13, 1993

Heat-stable polyimides and polyamide-imides with modified benzhydrol

Applicant:
Inventors:

Gerhard Greber, deceased, late of Bad Voslau, AT;

Heinrich Gruber, Vienna, AT;

Marcel Sychra, Krems a.d.Donau, AT;

Assignee:

Chemie Linz GmbH, , AT;

Attorney:

Wenderoth, Lind & Ponack

Primary Examiner:

John Kight, III

Assistant Examiner:

P Hampton-Hightower

Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528342 ; 528170 ; 528220 ; 528229 ; 5283291 ; 528331 ; 528352 ; 528353 ; 525432 ; 525436 ;
Abstract

Heat-stable polyimides and polyamideimides with modified benzhydrol structural elements and a process of preparing thereof; wherein the polyimides and polyamideimides are obtained by reacting 3,3'4,4'-benzhydroltetracarboxylic acid dimethyl ester a) with only a diamine and then cyclized to give polyimides or b) with a diamine and with trimellitic, phthalic-or isophthalic acid (or the anhydrides, acid chlorides, anhydride chlorides or esters) and is then cyclized to give polyamideimides.

Find Patent Forward Citations

Greber, deceased, Gerhard. (1995). Heat-stable polyimides and polyamide-imides with modified benzhydrol (U.S. Patent No. 5378799). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5378799

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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