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:
Nov. 23, 1976
Filed:
May. 16, 1974
Applicant:
Inventors:
Norman LeRoy Dean, Lake Jackson, TX (US);
Wallace Eldon Embrey, Freeport, TX (US);
John Thomas Marshall, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ;
Abstract
Tetrachloropyridine is prepared by heating pentachloropyridine in an aqueous medium under pressure, with agitation, in the presence of a particulate oxidizable metal, e.g., zinc and a hydrogen-producing acid, e.g., hydrogen chloride. The tetrachloropyridine is then conveniently extracted with an inert, water-immiscible solvent, e.g., a halogenated hydrocarbon.
Dean, Norman. (1976). Preparation of tetrachloropyridine (U.S. Patent No. 3993654). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3993654
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile