Patents by Inventor David F. Gavin

David F. Gavin 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).

  • Method of isolating and recovering 2,4-dinitro-N-substituted-1,3-phenylenediamine compounds
    Patent number: 4078000
    Abstract: Improved method of isolating and recovering 2,4-dinitro-N-substituted-1,3-phenylenediamine compounds having a trifluoromethyl substituent in the 6-position of the aromatic ring from the reaction medium.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: March 7, 1978
    Assignee: Olin Corporation
    Inventors: David F. Gavin, Delmer A. Fidler, John H. Tobin
  • Process for preparing anhydrous metal fluorides
    Patent number: 4034070
    Abstract: A process for preparing anhydrous metal fluorides is described wherein metal is reacted with HF and halogen in the presence of a nitrile.
    Type: Grant
    Filed: September 22, 1976
    Date of Patent: July 5, 1977
    Assignee: Olin Corporation
    Inventors: John A. Wojtowicz, David F. Gavin
  • Conversion of nitroso compounds to isocyanates
    Patent number: 3979427
    Abstract: A process for preparing an organic isocyanate by reacting an organic nitroso compound with carbon monoxide in the presence of a catalyst comprised of a mixture of a noble metal and a Lewis acid.
    Type: Grant
    Filed: January 21, 1969
    Date of Patent: September 7, 1976
    Assignee: Olin Corporation
    Inventors: Gerhard F. Ottmann, David F. Gavin, Ehernfried H. Kober
  • Separation of 3,4-diaminotoluene from a mixture of o-toluenediamine isomers
    Patent number: 3960963
    Abstract: Purified 3,4-toluenediamine is separated from a mixture of o-toluenediamine isomers containing principally 3,4-toluenediamine and 2,3-toluenediamine by crystallizing from a solvent selected from the group consisting of toluene, benzene and xylene.
    Type: Grant
    Filed: July 29, 1974
    Date of Patent: June 1, 1976
    Assignee: Olin Corporation
    Inventor: David F. Gavin