Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2006-05-09
2006-05-09
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, C528S182000, C528S183000, C528S188000, C528S220000, C528S229000, C528S350000, C528S351000
Reexamination Certificate
active
07041778
ABSTRACT:
A novel polyimide resin consisting essentially of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), 3,4,3′,4′-biphenyltetracarboxylic dianhydride (BPDA), 2,2 bis (3′,4′-dicarboxy phenyl) hexafluoro propane dianhydride (6FDA), 2-(3,4-dicarboxyphenyl)-1-phenylacetylene anhydride (4-PEPA) and an aromatic diamine.
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Curliss David B.
Lincoln Jason E.
Thorp Katie E.
AFMCLO/JAZ
Hampton Hightower P.
Hersko Bart S.
The United States of America as represented by the Secretary of
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