Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Reexamination Certificate
2007-05-15
2007-05-15
Gulakowski, Randy (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C528S405000, C528S480000, C528S494000, C528S503000
Reexamination Certificate
active
10250859
ABSTRACT:
An oxytetramethylene glycol copolymer obtained by copolymerizing tetrahydrofuran and neopentyl glycol which has a specific number average molecular weight Mn, a specific molecular weight distribution Mw/Mn, a specific neopentyl glycol copolymerization whole ratio Nwand a specific neopentyl glycol copolymerization partial ratio Nh; a method for producing the same; and a method for purifying an oxytetramethylene glycol copolymer using fresh tetrahydrofuran.
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patent: 4728722 (1988-03-01), Mueller
patent: 6570041 (2003-05-01), Kodama et al.
patent: 2001/0041772 (2001-11-01), Masubuchi et al.
patent: 61-126134 (1986-06-01), None
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Aoshima et al. JP-61126134-English abstract Jun. 1986.
Aoshima et al. JP-61126134-Derwent English abstract Jun. 1986.
Aketo JP 10-025340 Machine English Translation obtained from JPO website Jan. 1998.
Fukuzono Toshihiko
Furubeppu Satoshi
Kodama Tamotsu
Asahi Kasei Kabushiki Kaisha
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Gulakowski Randy
Kugel Timothy J.
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