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. 21, 1976
Filed:
Mar. 31, 1975
Applicant:
Inventors:
Yoshio Oda, Yokohama, J;
Keiichi Uchida, Yokohama, J;
Takeshi Morimoto, Yokohama, J;
Seisaku Kumai, Yokohama, J;
Assignee:
Asahi Glass Co., Ltd., Tokyo, J;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ; 252435 ; 252437 ;
Abstract
Methacrylic acid is prepared by reacting methacrolein with molecular oxygen in the presence of a catalyst comprising (a) molybdenum, (b) phosphorus, (c) at least one element selected from the group consisting of thallium and cesium, (d) at least one element selected from the group consisting of vanadium, zirconium, tin, niobium, nickel, tantalum and iron, and (e) oxygen.
Oda, Yoshio. (1976). Process for preparing methacrylic acid (U.S. Patent No. 3998877). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3998877
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile