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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.:

US 4897502 B1

PDFFull Text
Date of Patent:
Jan. 30, 1990

Filed:

Oct. 07, 1987

Process for making solid polyhalotriaryl phosphate esters

Applicant:
Inventors:

Louis T Gunkel, Yardley, PA (US);

John Crosby, Lawrenceville, NJ (US);

Assignee:

FMC Corporation, Philadelphia, PA (US);

Attorneys:

Elden; R. E.

Anderson; R. L.

Primary Examiner:

Jacqueline V Howard

Assistant Examiner:

Margaret B Medley

Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
558102 ; 558150 ;
Abstract

A process is provided for making halogen-substituted triaryl phosphate esters which are normally solid under ambient conditions. The process comprises reacting a halogenated phenol with phosphorus oxychloride in the presence of a magnesium chloride catalyst above the melting point of the desired product. After the reaction is complete the product is recovered by adding an alcohol, such as, pentanol, 2-ethyl hexanol or hexanol and cooling the resulting mixture below the melting point of the product.

Find Patent Forward Citations

Gunkel, Louis. (1990). Process for making solid polyhalotriaryl phosphate esters (U.S. Patent No. 4897502). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4897502

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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