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:
Mar. 13, 1979
Filed:
Nov. 29, 1977
Applicant:
Inventors:
Haruo Imai, Yokohama, JP;
Tadashi Oohama, Tokyo, JP;
Ryozo Yamaguchi, Yokohama, JP;
Kunihiro Ninomiya, Yokohama, JP;
Assignee:
Mitsubishi Chemical Industries Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
2603974 ; 2603973 ;
Abstract
19-Norethisterone or 19-norandrost-4-ene-3,17-dione is purified by passing its solution in an aromatic hydrocarbon, an alkyl halide or an ester of acetic acid through a column packed with basic alumina and then crystallizing it.