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. 24, 1998
Filed:
Jan. 31, 1995
Applicant:
Inventors:
Joseph M Karpinski, Pottstown, PA (US);
Siegfried B Christensen, IV, Philadelphia, PA (US);
Steven Dabbs, Harlow Essex, GB;
Assignee:
SmithKline Beecham Corporation, Phila, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568663 ; 568 56 ; 548469 ;
Abstract
This invention relates to a method for preparing difluoromethyl ethers, thiols and amines without using chlorofluorocarbon gases. The intermediates prepared by this method can be used to make certain compounds which act as PDE IV inhibitors which are useful for treating asthma and other diseases implicated with the PDE IV isozyme.