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:
Dec. 02, 2003
Filed:
Mar. 14, 2002
Applicant:
Inventor:
Mark Purdie, Loughborough, GB;
Assignee:
AstraZeneca UK Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/38 ;
U.S. Cl.
CPC ...
C07F 9/38 ;
Abstract
A process for the preparation of salts of substituted or unsubstituted methylene bisphosphonic acids by hydrolysing the corresponding acid ester with hydrochloric acid, removing water from the acid azeotropically prior to addition of an amine or a base to produce the resultant salt in good yield.