Patents by Inventor Robert H. Lenhard

Robert H. Lenhard 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).

  • Novel monocycle .beta.-lactam antibacterials
    Patent number: 4808579
    Abstract: The disclosure describes (S)-3-[2-(2-amino-4-thiazolyl)]-(Z)-2-methoxyiminoacetylamino-2-oxo-1-azet idinyliminoacetic acid and (S)-3-[2-(2-amino-4-thiazolyl)]-(Z)-2-methoxyiminoacetylamino-2-(S)-methyl -4-oxo-1-azetidinyliminoacetic acid and the cationic salts thereof which possess antibacterial activity.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: February 28, 1989
    Assignee: American Cyanamid Company
    Inventors: William V. Curran, Robert H. Lenhard
  • Complement inhibitors
    Patent number: 4147801
    Abstract: Certain C-substituted trisulfonic acids, acid ureides, oxalyl amides and salts thereof useful as complement inhibitors.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: April 3, 1979
    Assignee: American Cyanamid Company
    Inventors: Robert H. Lenhard, Seymour Bernstein
  • Complement inhibitors
    Patent number: 4146640
    Abstract: Certain C-substituted trisulfonic acids, acid ureides, oxalyl amides and salts thereof useful as complement inhibitors.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: March 27, 1979
    Assignee: American Cyanamid Company
    Inventors: Robert H. Lenhard, Seymour Bernstein
  • Ureida-phenylenebis(substituted imino)multianionic substituted dinaphthalene sulfonic acids and salts
    Patent number: 4129591
    Abstract: Ureido-phenylenebis(substituted imino)multi-anionic substituted dinaphthalene sulfonic acids and salts, which are useful as complement inhibitors.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: December 12, 1978
    Assignee: American Cyanamid Company
    Inventors: Seymour Bernstein, Robert H. Lenhard, Ransom B. Conrow
  • Methyl substituted hydroxynaphthalenesulfonic acid ureides and salts as complement inhibitors
    Patent number: 4127602
    Abstract: Methyl substituted-hydroxynaphthalenesulfonic acid ureides and salts thereof useful as complement inhibitors.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: November 28, 1978
    Assignee: American Cyanamid Company
    Inventors: Seymour Bernstein, Robert H. Lenhard, Milton D. Heller