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:
Jan. 09, 2001
Filed:
Jul. 20, 1998
Applicant:
Inventors:
Assignee:
Bradford University, West Yorkshire, GB;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
C07C / ;
Abstract
A method of preparing a first geometric isomer of tamoxifen or an analogue comprises allowing the first isomer to crystallize in hexanol and the product thereof to crystallize in methanol and then derivatising the product of the methanol crystallization to prepare said first isomer in very high purity.