Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2011-07-05
2011-07-05
Gulakowski, Randy (Department: 1766)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C356S301000
Reexamination Certificate
active
07973125
ABSTRACT:
A method of evaluating the dissolution rate of a polyimide by Raman spectroscopy, wherein the Raman spectral intensity I(a) of imide groups contained within the polyimide is measured, and I(a) is then compared with the Raman spectral intensity I(b) of imide groups contained within a polyimide with a known dissolution rate. The polyimides are preferably obtained using an aromatic tetracarboxylic dianhydride and/or an aromatic diamine.
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Honda Keijirou
Ishibashi Kazuhiro
Ohtake Gouki
Okuda Naoki
Sasaki Nori
Antonelli, Terry Stout & Kraus, LLP.
Fang Shane
Gulakowski Randy
Hitachi Chemical Co. Ltd.
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