Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From ketone or ketene reactant
Reexamination Certificate
2007-08-16
2010-02-23
Truong, Duc (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From ketone or ketene reactant
C528S392000, C528S486000, C528S495000, C528S499000, C528S50200C, C528S503000
Reexamination Certificate
active
07666975
ABSTRACT:
There is provided a polyketone comprising repeating units, 95-100 mole % of which are 1-oxotrimethylene and having an intrinsic viscosity of 2.5-20 dl/g, wherein the content of Pd element is 0-20 ppm, terminal structures include an alkyl ester group (terminal group A) and an alkyl ketone group (terminal group B), and the equivalent ratio of terminal group A/terminal group B is 0.1-8.0. The polyketone of the present invention can be used in any forms, such as fibers and films, and can be applied to a wide variety of the uses such as clothing, reinforcing materials for rubbers, resins, cements, and optical fibers, electronic materials, battery materials, civil engineering materials, medical materials, daily commodities, fishery materials, and packaging materials.
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Kato Jinichiro
Komatsu Takashi
Taniguchi Ryu
Asahi Kasei Fibers Corporation
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Truong Duc
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