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:
Jul. 22, 2003
Filed:
Aug. 31, 2001
Applicant:
Inventors:
Michiel Barend Eleveld, Amsterdam, NL;
Johan Paul Smit, Amsterdam, NL;
Robert Adrianus Wilhelmus Grotenbreg, Amsterdam, NL;
Riemer Alberts De Groot, Amsterdam, NL;
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01J 3/118 ; B01J 3/734 ; C08G 6/512 ;
U.S. Cl.
CPC ...
D01J 3/118 ; B01J 3/734 ; C08G 6/512 ;
Abstract
Process comprising treating a double metal cyanide complex catalyst with sound waves and/or electromagnetic radiation, process for polymerising alkylene oxide in which such catalyst is used, and double metal cyanide complex catalyst which catalyst has been treated with sound waves and/or electromagnetic radiation.