Patents by Inventor Fred J. Impastato

Fred J. Impastato 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).

  • Patent number: 5208374
    Abstract: A non-aromatic tert-amine is oxidized with hydrogen peroxide at about 20.degree.-100.degree. C. by a carbon dioxide-accelerated high solids process in which discoloration of the amine oxide product is minimized by diluting the carbon dioxide before allowing it to contact the reaction mixture so that the entire reaction is conducted in an atmosphere composed of carbon dioxide and an amount of inert gas, such as nitrogen or air, which is at least equal in volume to the amount of carbon dioxide.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: May 4, 1993
    Assignee: Ethyl Corporation
    Inventors: James E. Borland, Fred J. Impastato, Kim R. Smith
  • Patent number: 5015764
    Abstract: A process for the separation of a racemic mixture of certain aliphatic carboxylic acids or esters thereof is disclosed. The process comprises (i) forming a salt solution comprising said racemic mixture of a C.sub.1 to C.sub.6 linear or branched aliphatic carboxylic acid and an organic or inorganic base (ii) treating said salt solution with one-half molar equivalent of a chiral organic nitrogenous base having a base strength no stronger than said organic or inorganic base (iii) precipitating from the reaction solution formed in step (ii) the less soluble diastereomeric salt and (iv) separating said precipitated diastereomeric salt.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: May 14, 1991
    Assignee: Ethyl Corporation
    Inventors: Thanikavelu Manimaran, Fred J. Impastato
  • Patent number: 4968837
    Abstract: Racemic 2-(N-propylamino)-5-methoxytetralin is resolved by treating it with a chiral diaroyltartaric acid in an organic solvent at an elevated temperature to form a salt of the amine and chiral diaroyltartaric acid which is soluble in the solvent at the elevated temperature, cooling to precipitate the salt, isolating it, and converting it to the free amine. The product is useful as an intermediate in the synthesis of optionally-active pharmaceutical, such as N-0437.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: November 6, 1990
    Assignee: Ethyl Corporation
    Inventors: Thanikavelu Manimaran, Fred J. Impastato