Patents by Inventor Surendra N. Sehgal

Surendra N. Sehgal 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).

  • Naphthyridinomycin antibiotics
    Patent number: 4003902
    Abstract: Naphthyridinomycin complex, a major component thereof called naphthyridinomycin A and a minor component thereof called naphthyridinomycin B are disclosed. These antibiotic substances exhibit antibacterial activity. The substances are producible by culturing a microorganism of the species Streptomyces in an aqueous nutrient medium under submerged aerobic fermentation conditions. Methods for their preparation and use are included.
    Type: Grant
    Filed: June 20, 1974
    Date of Patent: January 18, 1977
    Assignee: Ayerst McKenna and Harrison Ltd.
    Inventors: Dieter Kluepfel, Surendra N. Sehgal, Claude Vezina
  • Rapamycin and process of preparation
    Patent number: 3993749
    Abstract: Antibiotic rapamycin is producible by culturing Streptomyces hygroscopicus NRRL 5491 in an aqueous nutrient medium. Rapamycin has antifungal properties. Methods for its preparation and use are disclosed.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: November 23, 1976
    Assignee: Ayerst McKenna and Harrison Ltd.
    Inventors: Surendra N. Sehgal, Teodora M. Blazekovic, Claude Vezina
  • Antibiotic substances and preparation
    Patent number: 3983231
    Abstract: A new antibiotic complex, complex 484, components 484-A and 484-B thereof and a process for their preparation are disclosed. These antibiotic substances are producible by culturing a microorganism of the species Streptomyces in an aqueous nutrient medium under submerged aerobic fermentation conditions. The substances are useful against a broad spectrum of pathogenic bacteria. Methods for their use are disclosed also.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: September 28, 1976
    Assignee: Ayerst McKenna and Harrison Ltd.
    Inventors: Surendra N. Sehgal, Kartar Singh, Claude Vezina