Patents by Inventor Gershon J. Davis

Gershon J. Davis 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).

  • Preparation of vanadium-phosophorus-oxide catalyst precursor
    Patent number: 5108974
    Abstract: Vanadium pentoxide can be reduced to the +4 oxidation state from the +5 state, in the manufacture of vanadium-phosphorus-oxide catalyst precursor, (VO).sub.2 H.sub.4 P.sub.2 O.sub.9, by using phosphoric acid as the reducing agent rather than benzyl alcohol. Use of an alkyl silicate with the phosphoric acid insures the correct crystalline species, (VO).sub.2 H.sub.4 P.sub.2 O.sub.9, as indicated by X-ray diffraction.
    Type: Grant
    Filed: December 19, 1990
    Date of Patent: April 28, 1992
    Assignee: Akzo N.V.
    Inventor: Gershon J. Davis
  • Alkyl vanadate color improvement
    Patent number: 4465637
    Abstract: The color of alkyl vanadate compounds that have become discolored is improved by treating the vanadates with an oxygen-containing gas, e.g., air, preferably at elevated temperature.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: August 14, 1984
    Assignee: Stauffer Chemical Company
    Inventors: Alan J. Abramson, Gershon J. Davis
  • Process for the manufacture of alkyl vanadates
    Patent number: 4465636
    Abstract: The yield of alkyl vanadate formed by the reaction of vanadium pentoxide and an alkyl alcohol in the presence of an azeotroping agent and, preferably, a catalyst is improved by the present invention. It involves lowering, prior to the reaction, the amount of vanadium having a valence lower than +5 in the vanadium pentoxide reagent.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: August 14, 1984
    Assignee: Stauffer Chemical Company
    Inventors: Alan J. Abramson, Gershon J. Davis
  • Di-aryl monochlorophosphine waste treatment
    Patent number: 4463202
    Abstract: A method of treating the residue generated in the production of diphenylphosphinous chloride is presented. The method comprises extracting the aluminum content of the residue by contacting the residue with an organic solvent to produce a mixture which when hydrolyzed results in a two-phase solution, the organic phase of which can be incinerated.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: July 31, 1984
    Assignee: Stauffer Chemical Company
    Inventor: Gershon J. Davis
  • Process for forming alkyl vanadates using a catalyst
    Patent number: 4412956
    Abstract: Alkyl vanadates are formed by the reaction of vanadium pentoxide and an alkyl alcohol in the presence of an azeotroping solvent to assist in the removal of byproduct water, using an effective amount of a basic nitrogenous compound as a catalyst.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: November 1, 1983
    Assignee: Stauffer Chemical Company
    Inventors: Alan Abramson, George C. Ciomo, Gershon J. Davis, Edward D. Weil