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:
Nov. 08, 1977
Filed:
Jun. 25, 1976
Applicant:
Inventors:
Assignee:
Schering Aktiengesellschaft, Berlin and Bergkamen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
2602 / ; 26039725 ; 2603973 ; 2603974 ;
Abstract
An improved process for isolating 3-hydroxy steroids and 3-keto steroids from mixtures thereof with lipids by dissolving the mixtures in an organic solvent, mixing the dissolved mixture with a metal salt to form insoluble adducts of the steroids, separating the insoluble adducts and splitting the adducts to regenerate the free steroids, which comprises using methyl isobutyl ketone and/or methyl n-amyl ketone as the solvent and calcium bromide as the metal salt.
Weber, Alfred. (1977). Method for isolation of 3-hydroxy steroids and 3-keto steroids (U.S. Patent No. 4057541). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4057541
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile