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. 16, 2013
Filed:
Oct. 01, 2012
Applicant:
Wisconsin Alumni Research Foundation, Madison, WI (US);
Inventors:
Hector F. DeLuca, Deerfield, WI (US);
Rafal Barycki, Madison, WI (US);
James B. Thoden, Madison, WI (US);
Hazel M. Holden, Fitchburg, WI (US);
Assignee:
Wisconsin Alumni Research Foundation, Madison, WI (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C 401/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of purifying 1α-hydroxy-2-methylene-18,19-dinor-homopregnacalciferol to obtain 1α-hydroxy-2-methylene-18,19-dinor-homopregnacalciferol in crystalline form using precipitation with hexane from ethyl acetate. A method of preparing 1α-hydroxy-2-methylene-18,19-dinor-homopregnacalciferol crystals acceptable for X-ray experiment using precipitation with hexane from benzene by diffusive exchange of the solvents is also described.