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:
Aug. 27, 1985
Filed:
Aug. 18, 1983
Applicant:
Inventor:
Jerry M Roper, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
C10M / ;
U.S. Cl.
CPC ...
252 / ; 549399 ; 549405 ; 252407 ;
Abstract
4H-1-Benzopyrans are prepared by reacting an aminomethylphenol with an alkali metal hydroxide or an alkaline earth metal hydroxide and a 1,3-diketone. The products are useful as antioxidants.
Roper, Jerry. (1985). 4h-1-benzopyrans and lubricant compositions containing same (U.S. Patent No. 4537920). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4537920
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile