The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2002
Filed:
May. 19, 2000
David E. Laycock, Ontario, CA;
Kendra L. Flagler, Fenelon Falls, CA;
Robert J. Gulotty, Jr., Midland, MI (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
Metal [hexacyanocobaltate, cobalthexanitrite nitroferricyanide] complexes are useful alkylene oxide polymerization catalysts. The metal is any that forms a precipitate with the hexacyanocobaltate, cobalthexanitrite and nitroferricyanide groups. These catalysts are made from less expensive raw materials than the common zinc hexacyanocobaltate catalysts, and provide short induction periods and many cases more controlled exotherms. In addition, the metal [hexacyanocobaltate, cobalthexanitrite nitroferricyanide] catalysts often provide poly(propylene oxide) polymers having very low unsaturations, even when the catalyst is complexed with a complexing agent such as glyme.