Patents by Inventor Sergey G. Vulfson

Sergey G. Vulfson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cyanophosphorus compounds and their preparation
    Patent number: 5945082
    Abstract: Novel cyanophosphorus compounds are disclosed. The preparation, purification, and characterization of dicyanophosphinate, cyanopolyphosphates, tricyanocyclotriphosphonate and tetracyanocyclotetraphosphate are presented.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: August 31, 1999
    Assignee: Monsanto Company
    Inventors: Patrick J. Lennon, Sergey G. Vulfson
  • Cyanphosphonate derivatives and method for their preparation
    Patent number: 5935542
    Abstract: The novel cyanophosphonate compounds of the present invention include cyanophosphonate salts, cyanophosphonate monoacid salts, cyanophosphonate monoacid esters, cyanophosphonate monoester salts and cyanophosphonate methylester salts.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: August 10, 1999
    Assignee: Monsanto Company
    Inventors: Patrick J. Lennon, Sergey G. Vulfson
  • Method for preparing cyanophosphonate derivatives from phosphate esters and cyanide
    Patent number: 5861525
    Abstract: A process for preparing cyanophosphonate derivatives involves contacting a phosphate ester and cyanide in a reaction mixture under conditions sufficient to produce a cyanophosphonate derivative. That cyanophosphonate derivative product can subsequently be hydrogenated to produce an aminomethylphosphonate derivative.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: January 19, 1999
    Assignee: Monsanto Company
    Inventors: Patrick J. Lennon, Sergey G. Vulfson
  • Method for preparing cyanophosphonate derivatives from phosphoric anhydride and cyanide
    Patent number: 5858317
    Abstract: A process for preparing cyanophosphonate derivatives involves contacting phosphoric anhydride (P.sub.4 O.sub.10) and a cyanide, preferably in the presence of a Lewis base, in a reaction mixture under sufficient conditions to produce a cyanophosphonate derivative. The cyanophosphonate derivative can be subsequently hydrogenated to produce an aminomethylphosphonate derivative.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: January 12, 1999
    Assignee: Monsanto Company
    Inventors: Patrick J. Lennon, Sergey G. Vulfson
  • Method for preparing cyanophosphonate derivatives from pyrophosphate or polyphosphate esters and cyanide
    Patent number: 5859278
    Abstract: A process for preparing cyanophosphonate derivatives involves contacting a pyrophosphate ester or a polyphosphate ester and cyanide in a reaction mixture under conditions sufficient to produce the cyanophosphonate derivative. The cyanophosphonate derivative product can subsequently be hydrogenated to produce an aminomethylphosphonate derivative.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: January 12, 1999
    Assignee: Monsanto Company
    Inventors: Patrick J. Lennon, Sergey G. Vulfson