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. 12, 1995
Filed:
Apr. 19, 1994
Applicant:
Inventors:
Assignee:
Wako Pure Chemical Industries, Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564418 ; 564410 ; 564414 ;
Abstract
4-Amino-3-methyl-N-ethyl-N-(.beta.-hydroxyethyl)-aniline sulfate which is used particularly as a developer for color photography can be easily produced in high yield and high quality by nitrosating N-ethyl-N-(.beta.-hydroxyethyl)-m-toluidine by use of an alkyl nitrite in a homogeneous alcohol solution containing sulfuric acid in an amount of about 0.5 to about 1 mole per mole of N-ethyl-N-(.beta.-hydroxyethyl)-m-toluidine, and then reducing the nitrosation product in an aqueous alcohol solution after or without isolation of the nitrosation product.
Iritani, Takehiko. (1995). Process for producing n,n-disubstituted p-phenylenediamine derivative (U.S. Patent No. 5475140). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5475140
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile