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:
Jan. 18, 1977
Filed:
Nov. 30, 1973
Applicant:
Inventor:
Ryuhei Ueeda, Kurashiki, JA;
Assignee:
Kuraray Co., Ltd., Kurashiki, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 2605 / ; 252435 ; 252437 ;
Abstract
Maleic anhydride is obtained by oxidizing an unsaturated hydrocarbon having at least 4 carbon atoms in the presence of a catalyst comprising the oxides of tungsten and phosphorus, and at least one catalyst promoter selected from the groups consisting of a compound of a metallic element belonging to groups III A, III B, IV A and VIII of the Periodic Table; arsenic, zirconium, antimony, and niobium.