Patents by Inventor Ronald E. Seamans

Ronald E. Seamans 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).

  • Process for the synthesis of 2-amino-3,5-dihydro-7-substituted-4H-pyrrolo[3,]pyrimidin-4-ones
    Patent number: 5386031
    Abstract: An improved process for the preparation of 2-amino-3,5-dihydro-7-substituted-4H-pyrrolo[3,2-d]pyrimidin-4-ones is described wherein 2,6-diamino-3,5-dihydro-7-substituted-4H-pyrrolo[3,2-d]pyrimidin-4-one is converted to a diazonium salt which is subsequently catalytically hydrogenated to the desired compound, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: January 31, 1995
    Assignee: Warner-Lambert Company
    Inventors: Randall L. De Jong, Ronald E. Seamans, James R. Zeller
  • Process for cyclic amino acid anticonvulsant compounds
    Patent number: 5362883
    Abstract: An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: November 8, 1994
    Assignee: Warner-Lambert Company
    Inventors: Rex A. Jennings, Don R. Johnson, Ronald E. Seamans, James R. Zeller
  • Process for cyclic amino acid anticonvulsant compounds
    Patent number: 5319135
    Abstract: An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: June 7, 1994
    Assignee: Warner-Lambert Company
    Inventors: Rex A. Jennings, Don R. Johnson, Ronald E. Seamans, James R. Zeller
  • Process for cyclic amino acid anticonvulsant compounds
    Patent number: 5132451
    Abstract: An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: July 21, 1992
    Assignee: Warner-Lambert Company
    Inventors: Rex A. Jennings, Don R. Johnson, Ronald E. Seamans, James R. Zeller
  • Phosphate salts of 1-[2-[(1-alkoxycarbonyl-3-aralkyl)-amino]-1-oxoalkyl]octahydro-1H-indole -2-carboxylic acids, preparation of, and medical compositions thereof
    Patent number: 4490386
    Abstract: Phosphate salts of the substituted acyl derivatives of octahydro-1H-indole-2-carboxylic acid are produced by treating a suitably substituted octahydro-1H-indole with phosphoric acid. The phosphate salts of the compounds and pharmaceutical compositions thereof are useful as antihypertensive agents.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: December 25, 1984
    Assignee: Warner-Lambert Company
    Inventors: Ronald E. Seamans, Walter E. Behnke