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:
Aug. 09, 1983
Filed:
Aug. 19, 1980
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
525426 ; 428411 ; 428413 ; 4284744 ; 525430 ; 525445 ; 528 25 ; 528 99 ; 528112 ; 528113 ; 528125 ; 528128 ; 528289 ; 528297 ;
Abstract
The invention relates to oligomeric and/or polymeric precursor stages of polyoxazoles, as well as to a method for the preparation of these precursor stages. New radiation-reactive polymer precursor stages are provided comprised of addition products of olefinically unsaturated monoepoxides on hydroxyl group-containing polycondensation products of aromatic and/or heterocyclic dihydroxy diamino compounds with dicarboxylic-acid chlorides or esters. The radiation-reactive precursor stages according to the invention are suitable, for example, for the preparation of highly heat-resistant relief structures and as coatings for the optical fibers of light waveguides.