Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-04-19
2005-04-19
Pezzuto, Helen L. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S184000, C526S216000, C526S271000, C526S332000
Reexamination Certificate
active
06881803
ABSTRACT:
In the first aspect of the present invention, there is disclosed a method for producing a copolymer of an alkyl vinyl ether and maleic anhydride which comprises removing an organic solvent used in a reaction under a temperature so that a slurry state can be maintained. According to the first aspect, such a copolymer of the alkyl vinyl ether and maleic anhydride which contains a little amount of the solvent remaining therein as disclosed in the second aspect of the present invention, can be obtained.Further, it can be avoided that a specific viscosity of the copolymer of the alkyl vinyl ether and maleic anhydride is lowered, by means of a method for producing a copolymer of alkyl vinyl ether and maleic anhydride which comprises shielding oxygen in a polymerization, as disclosed in the third aspect of the present invention.
REFERENCES:
patent: 2782182 (1957-02-01), Verburg et al.
patent: 3030343 (1962-04-01), Jones et al.
patent: 3499876 (1970-03-01), Field et al.
patent: 3532771 (1970-10-01), Field et al.
patent: 3553183 (1971-01-01), Field et al.
patent: 4900809 (1990-02-01), Tazi et al.
patent: 4939198 (1990-07-01), Tazi et al.
patent: 4948848 (1990-08-01), Tazi et al.
patent: 4952558 (1990-08-01), Goertz et al.
patent: 5034487 (1991-07-01), Tazi et al.
patent: 3108100 (1983-01-01), None
patent: 3302495 (1985-07-01), None
patent: 3736996 (1990-08-01), None
patent: 3712265 (1991-09-01), None
patent: 906230 (1962-09-01), None
patent: 1117515 (2002-06-01), None
patent: 55145714 (1980-11-01), None
patent: 1204910 (1989-08-01), None
patent: 1204911 (1989-08-01), None
patent: 1204912 (1989-08-01), None
patent: 4504869 (1990-03-01), None
patent: 3215509 (1991-09-01), None
patent: 2000191705 (2000-07-01), None
patent: 3221511 (2001-10-01), None
patent: WO 9012817 (1990-09-01), None
patent: WO 9012036 (1990-10-01), None
patent: WO 9202564 (1992-02-01), None
Endo Toshio
Fujii Tatsumi
Saito Morihito
Tsuji Yasuo
Daicel Chemical Industries Ltd.
Morgan & Finnegan , LLP
Pezzuto Helen L.
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