Patents by Inventor John H. Chalmers, Jr.

John H. Chalmers, Jr. 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 producing antibiotic A21A
    Patent number: 4175007
    Abstract: Antibiotic A21A is produced by cultivating Stneptomyces filipinesis under aerobic conditions.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: November 20, 1979
    Assignee: Merck & Co., Inc.
    Inventors: Sheldon B. Zimmerman, John H. Chalmers, Jr.
  • Antibiotic A21A
    Patent number: 4071631
    Abstract: There is disclosed a new antibiotic A21A which is produced by cultivating the microorganism, Streptomyces filipinensis, in aqueous nutrient medium. The antibiotic has growth-improving activity.
    Type: Grant
    Filed: October 29, 1976
    Date of Patent: January 31, 1978
    Assignee: Merck & Co., Inc.
    Inventors: Sheldon B. Zimmerman, John H. Chalmers, Jr.