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:
Feb. 28, 1989
Filed:
Oct. 28, 1987
Applicant:
Inventor:
Josef Pfeifer, Therwil, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549244 ; 562441 ; 560 76 ; 564163 ;
Abstract
Amino-tetraalkylbenzoylphthalic acids are intermediates for preparing homopolyimides and copolyimides which contain structural elements of the formula I ##STR1## in which R.sup.1 and R.sup.2 are halogen, nitro, aryl, aryloxy, alkyl or alkoxy, m is 0 or a number from 1 to 4, n is 0 or a number from 1 to 3 and p is 0, 1 or 2, the free carbonyl groups are bonded in the ortho-position relative to one another and R is a divalent aromatic radical which is substituted by at least one alkyl group or aralkyl group, are autophotocrosslinkable. They are suitable for the production of protective films and photographic relief images.