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:
Jul. 16, 2002
Filed:
Aug. 29, 2001
Applicant:
Inventor:
Kazuya Ujihara, Minoo, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
C07D / ;
Abstract
4-Hydroxy-6-methyl-3-(4-methyl-2-pentenoyl)-2-pyrone isobtained by allowing 2,3-dihydro-7-methyl-2-(1-methylethyl)-4H,5H-pyrano[4,3-b]pyran-4,5-dione to react with at least one inorganic compound selected from alkali hydroxides, alkaline earth hydroxides, alkali carbonates, alkaline earth carbonates and alkali fluorides in an alcohol, water or a mixture thereof.