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:
Feb. 24, 1987
Filed:
Apr. 22, 1985
Applicant:
Inventors:
Walter M Kruse, Wilmington, DE (US);
John F Stephen, West Chester, PA (US);
Assignee:
ICI Americas Inc., Wilmington, DE (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546290 ;
Abstract
A method for synthesizing the aromatic compound 5-methyl-2-pyridone from the corresponding 3,4-dihydro compound by dehydrogenation using sulphur. Particular advantages are achieved by reaction at about 180.degree. C. or less. The product is useful as an intermediate for the preparation of various pyridyloxyphenoxy herbicides.