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:
Feb. 24, 2009
Filed:
Oct. 29, 2003
Applicants:
Masayuki Kitagawa, Kitakatsushika-gun, JP;
Kazuya Okamoto, Adachi-ku, JP;
Inventors:
Masayuki Kitagawa, Kitakatsushika-gun, JP;
Kazuya Okamoto, Adachi-ku, JP;
Assignee:
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 491/22 (2006.01); A61K 31/4745 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is intended to provide water-soluble derivative of camptothecins which are excellent in therapeutic effect and suitable for chemotherapy for cancer. Namely, a water-soluble high-molecular weight derivative of camptothencins being excellent in sustained-release which is obtained by ester-bonding a carboxylic acid group of a polyethylene glycol-polycarboxylic acid polymer to a phenolic hydroxyl group of phenolic camptothencins.