Patents by Inventor Friedrich Dursch

Friedrich Dursch 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).

  • Steroid monohydrates, formulations containing same and method
    Patent number: 4447426
    Abstract: A monohydrate of a steroid having the structure ##STR1## and the 1,2-dehydro derivatives thereof, is provided which monohydrate is in the form of a particulate material having a stable average particle size of less than about 20 microns. Cream and lotion formulations containing the steroid monohydrate and a method for forming the monohydrate are also provided.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: May 8, 1984
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Yu-Chang J. Wang, Friedrich Dursch, Richard L. O'Laughlin, Thaddeus Prusik
  • Derivatives of pleuromutilin and compositions
    Patent number: 4086359
    Abstract: A new neutral fumarate salt of a derivative of the antibiotic pleuromutilin has been found whose physical properties made bulk manufacture more reproducible, simplify formulation and provide advantages in the administration of the substance.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: April 25, 1978
    Assignee: E. R. Squibb & Sons, Inc.
    Inventor: Friedrich Dursch
  • Antibiotic compositions and method
    Patent number: 3940483
    Abstract: Dry solid antibiotic compositions are provided comprising a solid acidic, basic or amphoteric antibiotic and a suitable solid basic or acidic additive, for reconstitution as injectables upon addition of water.A method is also provided for formulating injectable antibiotics.
    Type: Grant
    Filed: October 18, 1971
    Date of Patent: February 24, 1976
    Assignee: E. R. Squibb & Sons, Inc.
    Inventor: Friedrich Dursch