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:
Jan. 30, 1979
Filed:
Jul. 11, 1977
Applicant:
Inventors:
John D Bacha, Monroeville, PA (US);
Anatoli Onopchenko, Monroeville, PA (US);
Johann G Schulz, Pittsburgh, PA (US);
Assignee:
Gulf Research & Development Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562408 ;
Abstract
A process for converting (1) an indene, (2) a polyindene, (3) a dihydronaphthalene or (4) a polydihydronaphthalene to 4-nitro-o-phthalic acid which involves nitrating said indene, polyindene, dihydronaphthalene or polydihydronaphthalene and then oxidizing said nitrated indene, polyindene, dihydronaphthalene or polydihydronaphthalene with nitric acid.
Bacha, John. (1979). Process for preparing 4-nitro-o-phthalic acid (U.S. Patent No. 4137419). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4137419
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile