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:
Mar. 01, 2005
Filed:
Jun. 27, 2003
Applicants:
Andreas Walter, Egloffstein, DE;
Ingo Gnüchtel, Merching, DE;
Anna Maltenberger, Leutenbach, DE;
Recai Sezi, Röttenbach, DE;
Horst Hartmann, Merseburg, DE;
Inventors:
Andreas Walter, Egloffstein, DE;
Ingo Gnüchtel, Merching, DE;
Anna Maltenberger, Leutenbach, DE;
Recai Sezi, Röttenbach, DE;
Horst Hartmann, Merseburg, DE;
Assignee:
Infineon Technologies AG, Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C211/54 ; C07C211/55 ;
U.S. Cl.
CPC ...
Abstract
A bis-o-aminophenol has a formula IThese bis-o-aminophenols permit the preparation of polybenzoxazoles stabilized at high temperatures. The bis-o-aminophenols are preferably prepared from the corresponding diols, which are first nitrosated. The nitroso compound is then reduced to the amino compound by hydrogenation with Pd/C and H.