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. 30, 1980
Filed:
Feb. 04, 1980
Applicant:
Inventors:
Alan C Barnes, Cirencester, GB;
Peter D Kennewell, Swindon, GB;
Assignee:
Roussel Uclaf, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
260335 ; 564 91 ;
Abstract
A novel process for the preparation of xanthane-2-carboxylic acids of the formula ##STR1## wherein R is selected from the group consisting of hydrogen and alkyl of 1 to 9 carbon atoms and R.sub.1 is alkyl of 1 to 5 carbon atoms which possess an antiallergic activity and are particularly useful for treating asthma and asthmatic form bronchitisis of allergic origin.