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:
Mar. 28, 1978
Filed:
Dec. 27, 1976
Gail H Birum, Kirkwood, MO (US);
Richard F Jansen, Oakville, MO (US);
Monsanto Company, St. Louis, MO (US);
Abstract
2-Carboxyethyl(phenyl)phosphinic acid is prepared in two stages by first reacting dichloro(phenyl)phosphine with acrylic acid employed at a molar excess of 25% to 45% to form a mixture of three intermediates, namely 3-(chlorophenylphosphinyl)propionyl chloride, the cyclic anhydride of 2-carboxyethyl(phenyl)phosphinic acid and the mixed anhydride of acrylic acid with 3-chlorocarbonylethyl(phenyl)phosphinic acid. The second stage of the process is the hydrolysis of the mixture of three intermediates set forth above to obtain the desired product. The product is useful as a flame retardant material when used with organic polymers such as polyesters.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile