Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2006-05-30
2006-05-30
Hightower, P. Hampton (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S125000, C528S126000, C528S128000, C528S171000, C528S172000, C528S173000, C528S174000, C528S176000, C528S183000, C528S185000, C528S188000, C528S220000, C528S229000, C528S350000, C528S353000, C528S480000, C528S50200C, C525S420000, C525S422000, C525S425000, C525S432000, C525S436000, C264S176100
Reexamination Certificate
active
07053168
ABSTRACT:
A method for preparing a polyimide includes introducing a mixture of an oligomer and a solvent to an extruder, removing solvent via at least one extruder vent, and melt kneading the oligomer to form a polyimide. The polyimide has a low residual solvent content. The method is faster than solution polymerization of polyimides, and it avoids the stoichiometric inaccuracies associated with reactive extrusion processes that use monomers as starting materials.
REFERENCES:
patent: 3451462 (1969-06-01), Szabo et al.
patent: 3803085 (1974-04-01), Takekoshi et al.
patent: 3833544 (1974-09-01), Takekoshi et al.
patent: 3847867 (1974-11-01), Heath et al.
patent: 3850885 (1974-11-01), Takekoshi et al.
patent: 3852242 (1974-12-01), White
patent: 3855178 (1974-12-01), White
patent: 3905942 (1975-09-01), Takekoshi et al.
patent: 3983093 (1976-09-01), Williams et al.
patent: 3991004 (1976-11-01), Takekoshi et al.
patent: 3998840 (1976-12-01), Williams et al.
patent: 4011198 (1977-03-01), Takekoshi et al.
patent: 4073773 (1978-02-01), Banucci et al.
patent: 4324882 (1982-04-01), Takekoshi et al.
patent: 4443591 (1984-04-01), Schmidt et al.
patent: 4443592 (1984-04-01), Schmidt et al.
patent: 4511535 (1985-04-01), Schmidt et al.
patent: 4550156 (1985-10-01), Gallagher
patent: 4585852 (1986-04-01), Lo et al.
patent: 4680373 (1987-07-01), Gallagher et al.
patent: 4686279 (1987-08-01), Nagtzaam et al.
patent: 4689391 (1987-08-01), Peters et al.
patent: 4769476 (1988-09-01), Howson
patent: 4835249 (1989-05-01), Gallagher et al.
patent: 5106938 (1992-04-01), Bookbinder et al.
patent: 5189137 (1993-02-01), Howson et al.
patent: 5283021 (1994-02-01), Shih
patent: 5480616 (1996-01-01), Richardson et al.
patent: 5589111 (1996-12-01), Haruta et al.
patent: 5633319 (1997-05-01), Silvi et al.
patent: 6361724 (2002-03-01), Maeda et al.
patent: 6906168 (2005-06-01), Khouri et al.
patent: 2005/0070684 (2005-03-01), Gallucci et al.
patent: 1063761 (1979-10-01), None
patent: 0 274 602 (1988-07-01), None
patent: 0 364 376 (1990-04-01), None
patent: 0541 055 (1993-05-01), None
PCT Search Report—Jan. 21, 2005.
JP58147332 Abstract Only Sep. 2, 1983 Hanamura Teizou et al.
JP11268098 Abstract Only Oct. 5, 1999 Takamoto Seiji.
JP6093014 Abstract Only Apr. 5, 1994 Tanaka Koji et al.
U.S. Appl. No. 10/648,647, filed Aug. 26, 2003, Paul W. Buckley et al.
U.S. Appl. No. 10/648,604, filed Aug. 26, 2003, Jiawen Dong et al.
Giammattei Mark Howard
Howson Paul Edward
Khouri Farid Fouad
Silvi Norberto
Cantor & Colburn LLP
General Electric Company
Hampton Hightower P.
LandOfFree
Method for preparing polyimide and polyimide prepared thereby does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing polyimide and polyimide prepared thereby, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing polyimide and polyimide prepared thereby will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3625832