Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2006-04-04
2006-04-04
Hightower, P. Hampton (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S125000, C528S126000, C528S128000, C528S172000, C528S173000, C528S174000, C528S176000, C528S183000, C528S188000, C528S220000, C528S229000, C528S350000, C528S351000, C528S026000, C428S001100, C428S001200, C428S001260, C428S473500, C427S385500
Reexamination Certificate
active
07022809
ABSTRACT:
The present invention relates to novel polyimides derived from 6FDA and from 3,3-dihydroxy-4,4′-diaminobiphenyl and novel polyimides derived from PMDA and from Bis-AP-AF, having alkyl, arylalkyl, heteroarylalkyl, (cycloalkyl)alkyl, fluoroalkyl or siloxane side groups.The present invention also relates to a method of producing nematic liquid-crystal devices, which comprises the steps consisting in:depositing one of the polyimides according to the invention on a substrate;annealing the polyimide in one or more steps; anddefining an azimuthal orientation of the polyimide coating.
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Dubois Jean-Claude
Gallaire Didier
Lamarque Sandrine
Blakely & Sokoloff, Taylor & Zafman
Hampton Hightower P.
Nemoptic
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