Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2005-09-27
2005-09-27
Hightower, P. Hampton (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S172000, C528S173000, C528S174000, C528S183000, C528S188000, C528S220000, C528S229000, C528S272000, C528S288000, C528S350000, C528S353000, C525S420000, C525S422000, C525S432000, C525S436000, C585S352000, C560S001000, C560S008000, C560S057000
Reexamination Certificate
active
06949618
ABSTRACT:
Provided are polyimide and a thin film thereof which have a three-dimensional structure and therefore are excellent in a mechanical strength and a heat resistance as compared with those of conventional linear polyimide. The polyimide is obtained from a salt of multifunctional amine represented by Formula (1):(wherein A represents a tetravalent organic group, and n represents an integer of 0 to 3) and tetracarboxylic diester represented by Formula (2):(wherein B represents a tetravalent organic group having 1 to 20 carbon atoms, and R1and R2each represent independently an alkyl group having 1 to 5 carbon atoms).
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Chisso Corporation
Hampton Hightower P.
J.C. Patents
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