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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.:

US 4678856 B1

PDFFull Text
Date of Patent:
Jul. 07, 1987

Filed:

Sep. 02, 1986

Method of manufacturing aromatic urethane and intermediate product

Applicant:
Inventors:

Takao Ikariya, Tokyo, JP;

Masanori Itagaki, Yokohama, JP;

Masatsugu Mizuguchi, Kawasaki, JP;

Itaru Sakai, Yokohama, JP;

Osamu Tajima, Kamakura, JP;

Assignee:

Nippon Kokan Kabushiki Kaisha, Tokyo, JP;

Attorney:

Frishauf, Holtz, Goodman & Woodward

Primary Examiner:

Bernard Helfin

Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
560 24 ; 546308 ; 546309 ; 560 12 ; 560 25 ; 560 27 ; 560 28 ; 560 30 ; 560 31 ; 560 32 ; 564 48 ; 564 55 ;
Abstract

The present invention relates to a method of manufacturing aromatic urethane, an aromatic mononitro-compound, an aromatic primary amine, and carbon monoxide being reacted using a catalyst containing a platinum group metal-containing compound as a major constituent to prepare N,N'-di-substituted urea. The resultant N,N'-di-substituted urea is reacted with a hydroxyl group-containing organic compound to prepare an aromatic primary amine and aromatic urethane, and the aromatic primary amine is separated to obtain aromatic urethane.

Find Patent Forward Citations

Ikariya, Takao. (1987). Method of manufacturing aromatic urethane and intermediate product (U.S. Patent No. 4678856). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4678856

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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