Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2008-07-29
2008-07-29
Keys, Rosalynd (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S679000
Reexamination Certificate
active
11526037
ABSTRACT:
The present invention relates to a process comprising using ionic liquids for the polycondensation of 1,3-propanediol reactants to produce polytrimethylene ether glycol and copolymers thereof.
REFERENCES:
patent: 2520733 (1950-08-01), Morris et al.
patent: 3326985 (1967-06-01), Mason
patent: 5608105 (1997-03-01), Fitzpatrick
patent: 5859263 (1999-01-01), Ghorpade et al.
patent: 6054611 (2000-04-01), Farone et al.
patent: 6720459 (2004-04-01), Sunkara et al.
patent: 6818593 (2004-11-01), Manzer
patent: 2002/0007043 (2002-01-01), Sunkara et al.
patent: 2003/0233011 (2003-12-01), Fagan et al.
patent: 2005/0020805 (2005-01-01), Sunkara et al.
patent: WO 01/44150 (2001-06-01), None
patent: WO 03/048078 (2003-06-01), None
patent: WO 2006/009857 (2006-01-01), None
PCT International Search Report for International Application No. PCT/US2006/037136 dated Feb. 19, 2007.
Wasserscheid & Keim, “Ionic Liquids—New ‘Solutions’ for Transition Metal Catalysis”, Angew. Chem. Int. Ed. (2002) 39:3772-3789.
Sheldon, “Catalytic reactions in ionic liquids”, Chem. Commun. (2001) 2399-2407.
Harmer Mark Andrew
Junk Christopher P.
Manzer Leo Ernest
E.I. du Pont de Nemours and Company
Keys Rosalynd
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