Patents by Inventor John G. Stam

John G. Stam 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).

  • Salts of 6-alpha-(aminomethyl)penicillanic acid 1,1-dioxide esters and beta-lactam antibiotics
    Patent number: 4521533
    Abstract: Salts of readily hydrolyzable esters of 6-alpha-(aminomethyl)penicillanic acid 1,1-dioxide and (a) prodrug forms of ampicillin and amoxicillin or (b) ampicillin and amoxicillin and a dibasic acid are readily absorbed following oral adminstration, and are useful in treating bacterial infections.
    Type: Grant
    Filed: July 12, 1984
    Date of Patent: June 4, 1985
    Assignee: Pfizer Inc.
    Inventors: Ernest S. Hamanaka, John G. Stam
  • Broad spectrum antibiotics
    Patent number: 4073783
    Abstract: 6- .alpha.-(Amidino- and imidoylaminoalkanoylamino)aracylamino!-penicillanic acids and synthetic methods for the preparation thereof.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: February 14, 1978
    Assignee: Pfizer Inc.
    Inventors: Ernest S. Hamanaka, John G. Stam
  • Broad spectrum antibiotics
    Patent number: 4025506
    Abstract: 6-[.alpha.-(Amidino- and imidoylaminoalkanoylamino)aracylamino]-penicillanic acids and synthetic methods for the preparation thereof.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: May 24, 1977
    Assignee: Pfizer Inc.
    Inventors: Ernest S. Hamanaka, John G. Stam
  • Broad Spectrum antibiotics
    Patent number: 4025504
    Abstract: 6-[.alpha.-(Amidino- and imidoylaminoalkanoylamino)aracylamino]-penicillanic acids and synthetic methods for the preparation thereof.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: May 24, 1977
    Assignee: Pfizer Inc.
    Inventors: Ernest S. Hamanaka, John G. Stam
  • Process for the manufacture of alkali metal salts of 6-[2-phenyl-2-(imidoylaminoalkanoylamino)acetamido]penicillanic acids
    Patent number: 4024130
    Abstract: An improved process for the manufacture of alkali metal salts of 6-[2-phenyl-2-(imidoylaminoalkanoylamino)acetamido]penicillanic acids.
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: May 17, 1977
    Assignee: Pfizer Inc.
    Inventor: John G. Stam
  • Broad spectrum antibiotics
    Patent number: 3951952
    Abstract: 6-[.alpha.-(Amidino- and imidoylaminoalkanoylamino)aracylamino]-penicillanic acids and synthetic methods for the preparation thereof.
    Type: Grant
    Filed: December 14, 1973
    Date of Patent: April 20, 1976
    Assignee: Pfizer Inc.
    Inventors: Ernest S. Hamanaka, John G. Stam