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:
Oct. 30, 2012
Filed:
May. 22, 2009
Applicants:
Asako Toyoda, Tokyo, JP;
Hazuki Nagai, Tokyo, JP;
George Ng'ang'a Wanyoike, Tokyo, JP;
Inventors:
Assignees:
Sichuan Xieli Pharmaceutical Co., Ltd., Sichuan, CN;
MicroBiopharm Japan Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 491/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention offers a method of hydrogenating camptothecin in inert solvent in the presence of nickel catalyst, whereby selective hydrogenation of camptothecin can be very efficiently accomplished using the low-cost catalyst.
Toyoda, Asako. (2012). Method for producing camptothecin derivatives (U.S. Patent No. 8299251). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8299251
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile