Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2009-02-11
2010-12-07
Boykin, Terressa M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S322000, C528S363000
Reexamination Certificate
active
07847054
ABSTRACT:
A polyoxadiazole polymer is synthesized by heating polyphosphoric acid to a temperature of at least about 160° C. and making a solution by mixing hydrazine sulfate salt with one or more dicarboxylic acids or their derivatives in the heated polyphosphoric acid. The solution is heated under an inert gas atmosphere and the polymer is precipitated in a basic solution. The polyoxadiazole polymer can be produced as a homopolymer or copolymer, and may be used to produce a membrane or fibers.
REFERENCES:
patent: 3567698 (1971-03-01), Kovacs et al.
patent: 3644297 (1972-02-01), Sekiguchi et al.
patent: 3734893 (1973-05-01), Studinka et al.
patent: 4054633 (1977-10-01), Richardson et al.
patent: 4423202 (1983-12-01), Choe
patent: 4476295 (1984-10-01), Stephens
patent: 4500701 (1985-02-01), Stephens
patent: 4519940 (1985-05-01), Schroeder et al.
patent: 4599399 (1986-07-01), Kurkov
patent: 2005/0282998 (2005-12-01), Nakaya et al.
patent: 24 08 426 (1975-08-01), None
patent: 2721454 (1977-12-01), None
patent: 3341377 (1984-07-01), None
patent: 292919 (1991-08-01), None
patent: 102007029542 (2009-01-01), None
patent: 1642920 (2006-04-01), None
patent: 2009728 (2008-12-01), None
patent: 2130593 (1984-06-01), None
patent: 63118331 (1988-05-01), None
patent: 2263685 (2005-11-01), None
Hensema et al., “Synthesis and Properties of Related Polyoxiazoles and Polytriazoles”, Journal of Polymer Science, Feb. 1994, pp. 527-537.
Gomes et al., “Characterization of Partially Sulfonated Polyoxiazoles and Oxadiazole-triazole copolymers”, Journal of Membrane Science, Apr. 2007, pp. 121-129.
Iwakura et al. Journal of Polymer Science.: Part A, vol. 3, 1965, pp. 45-54.
Krongauz et al., Vysokomol soyed 1970;A12, No. 1, Kinetic dependences of polycyclization . . . .
Gomes et al.; Polymer 42 (2001) 851-865; Study of the synthesis of poly (4, 4′-diphenylether-1,3,4 . . . .
Gomes et al. (2003) Polymer 44 (2003) 3633-3639; Synthesis and characterization of flexible polyoxadiazole . . . .
Gomes et al.; Polymer 45 (2004) 4997-5004; Effects of reaction variables on the reproducibility of the . . . .
Gomes et al.; Journal of Power Sources 175 (2008) 49-59; Single-step synthesis of sulfonated polyoxadiazoles . . . .
Gomes (2002) PhD thesis, COPPE/UFRJ, Rio de Janeiro, Brazil, 2002.
German Office Action for DE 102008009068.9 dated Sep. 2, 2008.
de Figueiredo Gomes Dominique
Loos Marcio Rodrigo
Boykin Terressa M
GKSS-Forschungszentrum Geesthacht GmbH
Michaud-Kinney Group LLP
LandOfFree
Method for the synthesis of a polyoxadiazole polymer 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 the synthesis of a polyoxadiazole polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the synthesis of a polyoxadiazole polymer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4170843