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. 16, 1980
Filed:
Aug. 15, 1978
Applicant:
Inventors:
Ryuzo Ueno, Nishinomiya, JP;
Hiroaki Tsuchiya, Kobe, JP;
Yasukazu Muramoto, Itami, JP;
Yoshihiko Kuwae, Amagasaki, JP;
Assignee:
Kabushiki Kaisha Veno Seiyaku Oyo Kenkyujo, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562425 ; 562423 ; 562424 ;
Abstract
A process for preparing 2-hydroxynaphthalenecarboxylic acids which comprises reacting a liquid mixture of 1 mole of an alkali .beta.-naphtholate, 0.05 to 3 moles of .beta.-naphthol, and 0.1 to 5 times the weight of the alkali .beta.-naphtholate of light oil or kerosene with carbon dioxide under a carbon dioxide pressure of not more than 15 kg/cm.sup.2.G at a temperature of at least 180.degree. C.
Ueno, Ryuzo. (1980). Process for preparing 2-hydroxynaphthalenecarboxylic acids (U.S. Patent No. 4239913). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4239913
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile