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:
Apr. 02, 1991
Filed:
May. 15, 1989
Applicant:
Inventors:
Hiroshi Sato, Ehime, JP;
Kenichi Hirose, Ehime, JP;
Koichi Nagai, Ehime, JP;
Hiroshi Yoshioka, Ehime, JP;
Yoshihiko Nagaoka, Ehime, JP;
Assignee:
Sumitomo Chemical Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568940 ; 568927 ; 568937 ; 568939 ; 502 81 ; 502 84 ; 502 77 ;
Abstract
Nitrobenzenes are prepared by nitrating benzenes in a vapor phase with dilute or concentrated nitric acid wherein the following (A) or (B) is used as a catalyst: