logo

For the Inventor, By the Inventor

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 4841027 B1

PDFFull Text
Date of Patent:
Jun. 20, 1989

Filed:

Feb. 11, 1985

Process for preparing phenyl- and naphthylazo-aminonaphthol sulphonic

Applicant:
Inventors:

Yutaka Kayane, Moriguchi, JP;

Takashi Omura, Ashiya, JP;

Yasuo Tezuka, Nara, JP;

Hideharu Sone, Toyonaka, JP;

Assignee:

Sumitomo Chemical Company, Limited, Osaka, JP;

Attorney:

Stevens, Davis, Miller & Mosher

Primary Examiner:

Floyd D Higel

Int. Cl.
CPC ...
C09B / ; C09B / ; C09B / ; C09B / ;
U.S. Cl.
CPC ...
534599 ; 534591 ; 534841 ; 534842 ; 534581 ; 534582 ; 534887 ; 534617 ; 534642 ; 534638 ; 534635 ; 534637 ;
Abstract

Improvement in a process for producing an arylazo-aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR1## wherein A is a phenyl or naphthyl group unsubstituted or substituted by one to four members selected from alkyl, alkoxy, phenoxy, sulfonic acid, carboxylic acid, arylamino, amino, nitro and hydroxyl groups and halogen atoms, and m is 0 or 1, which comprises reacting an aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR2## wherein m is as defined above, with a dibasic acid anhydride to obtain an acylaminonaphtholsulfonic acid, coupling a diazonium compound of amine of the formula,

Find Patent Forward Citations

Quick Actions:

Kayane, Yutaka. (1989). Process for preparing phenyl- and naphthylazo-aminonaphthol sulphonic (U.S. Patent No. 4841027). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4841027

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

Loading…