Patents by Inventor John Robert Carson

John Robert Carson 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 5-aroylpyrrole-2-acetic acid derivatives
    Patent number: 4119639
    Abstract: The interaction of a 2-aryldithiolanium cation with an appropriate pyrrole-2-acetic acid derivative to give a 5-[2-aryl-2-(1,3-dithiolanyl)]pyrrole-2-acetic acid derivative which is then converted to the corresponding 5-aroylpyrrole-2-acetic acid derivative.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: October 10, 1978
    Assignee: McNeil Laboratories, Incorporated
    Inventor: John Robert Carson
  • Preparation of 1-methylpyrrole-2-acetonitrile
    Patent number: 4111954
    Abstract: 1-Methylpyrrole-2-acetonitrile is prepared by the reduction of .alpha.-imino-1-loweralkylpyrrole-2-acetonitrile using hydrogen sulfide as the reducing agent.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: September 5, 1978
    Assignee: McNeil Laboratories, Incorporated
    Inventors: John Robert Carson, Richard J. Carmosin, Anthony T. Stefanski
  • Process for preparing alkyl, aroyl substitute pyrrole-2-acetates
    Patent number: 4070368
    Abstract: The compounds are of the class of 5-aroyl-pyrrole alkanoic acids and corresponding acid derivatives thereof useful as anti-inflammatory agents and as synthetic intermediates.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: January 24, 1978
    Assignee: McNeil Laboratories, Incorporated
    Inventor: John Robert Carson
  • Halo-substituted 1-loweralkyl-5-aroylpyrrole-2-acetic acid compounds
    Patent number: 4048191
    Abstract: Halo-substituted 1-loweralkyl-5-aroylpyrrole-2-acetic acid compounds, useful for their anti-inflammatory activity.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: September 13, 1977
    Assignee: McNeil Laboratories, Incorporated
    Inventor: John Robert Carson
  • Preparation of .beta.-acyl pyrroles
    Patent number: 4002643
    Abstract: A process for rearranging .alpha.-acyl pyrroles to .beta.-acyl pyrroles which comprises reacting the former with an excess of a strong, anhydrous, non-oxidizing acid, preferably with heating.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: January 11, 1977
    Assignee: McNeil Laboratories, Inc.
    Inventor: John Robert Carson
  • Uncatalyzed aroylation of 1-alkylpyrrole-2-acetic acid derivatives
    Patent number: 3998844
    Abstract: A process of aroylating 1-alkylpyrrole-2-acetic acid esters and nitriles without employing the usual Friedel-Crafts of catalyst.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: December 27, 1976
    Assignee: McNeil Laboratories, Incorporated
    Inventor: John Robert Carson
  • Preparation of pyrrole-2-acetic acid derivatives
    Patent number: 3957818
    Abstract: Catalytic dehydrogenation of .DELTA.-2,.alpha.-pyrrolidenemalonates and .DELTA.-2,.alpha.-pyrrolidenemalononitriles yields pyrrole-2-acetates and pyrrole-2-acetonitriles, respectively. Subsequent hydrolysis of the latter affords pyrrole-2-acetic acids.
    Type: Grant
    Filed: November 7, 1974
    Date of Patent: May 18, 1976
    Assignee: McNeil Laboratories, Incorporated
    Inventor: John Robert Carson
  • Aroyl-substituted pyrroles
    Patent number: 3952012
    Abstract: The compounds are of the class of 5-aroyl-pyrrole alkanoic acids and corresponding acid derivatives thereof useful as anti-inflammatory agents and as synthetic intermediates.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: April 20, 1976
    Assignee: McNeil Laboratories, Incorporated
    Inventor: John Robert Carson
  • 5-Chlorocarbonyl
    Patent number: 3950355
    Abstract: A process of preparing certain 5-aroyl-pyrrole-2-alkanoic acid derivatives using phosgene and certain 5-unsubstituted pyrroles as starting materials, and certain novel 5-chlorocarbonyl-pyrrole precursors.
    Type: Grant
    Filed: April 18, 1974
    Date of Patent: April 13, 1976
    Assignee: McNeil Laboratories, Inc.
    Inventor: John Robert Carson