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. 08, 2003
Filed:
Jul. 06, 2000
Applicant:
Inventor:
Ulrich Berens, Grenzach-Wyhlen, DE;
Assignee:
Chirotech Technology Limited, Cambridge, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/50 ;
U.S. Cl.
CPC ...
C07F 9/50 ;
Abstract
The present invention concerns the preparation of a cyclic phosphine from the corresponding primary phosphine and a bifunctional alkylating agent, wherein alkylation, and displacement of each functional group, occurs in the presence of a strong base, is modified by adding the strong base, in an amount sufficient for cyclisation, to a preformed mixture or reaction product of the primary phosphine and the alkylating agent.
Berens, Ulrich. (2003). Process for preparing cyclic phosphines (U.S. Patent No. 6545183). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6545183
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile