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:
Jun. 06, 1989
Filed:
Jun. 16, 1986
Applicant:
Inventors:
Bordan W Krupay, Sarnia, CA;
Lloyd E Reid, Sarnia, CA;
Assignee:
Exxon Research and Engineering Company, Florham Park, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548555 ; 502414 ; 502415 ; 502416 ;
Abstract
N-methyl pyrrolidone solvent (hereinafter NMP) used to extract aromatic components from lubricating oil distillates is purified by contacting the solvent with activated alumina.
Krupay, Bordan. (1989). Removal of impurities from n-methyl-pyrrolidone using highly pure water (U.S. Patent No. 4837338). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4837338
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile