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:
Apr. 08, 2008
Filed:
Feb. 07, 2007
Applicants:
Ryu Hirata, Chiyoda-ku, JP;
Tatsuya Matsukawa, Chiyoda-ku, JP;
Inventors:
Ryu Hirata, Chiyoda-ku, JP;
Tatsuya Matsukawa, Chiyoda-ku, JP;
Assignee:
R-Tech Ueno, Ltd., Tokyo-to, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 69/74 (2006.01); C07C 61/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is an improved method for preparing 15-keto-prostaglandin E derivative. According to the invention, the deprotection of protected hydroxy group required in manufacturing a 15-keto-prostaglandin derivative is conducted under the presence of a phosphoric acid compound.