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:
Mar. 02, 1976
Filed:
Jul. 31, 1974
Applicant:
Inventors:
Hiroshi Koike, Takatsuki, JA;
Akio Fukui, Kyoto, JA;
Yuji Ito, Amagasaki, JA;
Takehiko Tanaka, Kobe, JA;
Yukio Okuda, Toyonaka, JA;
Assignee:
Nippon Shokubai Kagaku Kogyo Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2603 / ; 260369 ; 260378 ;
Abstract
A process for the preparation of 5-nitro-1,4-naphthoquinone comprising nitrating 1,4-naphthoquinone under such a condition that the dehydrating value of sulfuric acid in the reaction mixture is at least 4 to selectively introduce a nitro group into the 5-position and pouring the reaction mixture into an aqueous medium to precipitate the product.