Patents by Inventor David K. Dietrich

David K. Dietrich 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).

  • Publication number: 20080240998
    Abstract: A fluid path system includes a vial containing a frozen pharmaceutical product therein. A dissolution fluid path is also included in the fluid path system, the dissolution fluid path having an output end in fluid communication with the vial and an input end attached to a pressure vessel containing a dissolution medium. A delivery fluid path is also included in the system having a first end hermetically attached to the vial to transport therefrom a mixture of dissolved pharmaceutical product and dissolution medium and a second end connected to a receiving vessel to receive the mixture. A dissolution fluid path valve is positioned between the pressure vessel and the dissolution fluid path to control flow of the dissolution medium, and a delivery fluid path valve is also included in the fluid path system to control flow of the mixture from the delivery fluid path to the receiving vessel.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 2, 2008
    Inventors: John A. Urbahn, Jan Ardenkjaer-Larsen, Andrew M. Leach, Eric Telfeyan, David K. Dietrich, David B. Whitt, Peter Miller, Ernst W. Stautner
  • Patent number: 5049496
    Abstract: A. parasiticus is employed to hydroxylate biphenyls or terphenyls. The hydroxylation reaction is enhanced by gradually adding a carbon source to the culture medium-reaction medium, preferably in an amount to maintain the ammonium level below 300 ppm. during the bioconversion phase. Employment of a mutant strain of A. parasiticus which was isolated following ultraviolet light mutagenesis to reduce its tendency to produce aflatoxins is preferred.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: September 17, 1991
    Assignee: General Electric Company
    Inventors: David P. Mobley, David K. Dietrich
  • Patent number: 5049498
    Abstract: A. parasiticus is employed to hydroxylate 2'-hydroxyterphenyl compounds to terphenyltriols, which can be used to form branched polycarbonates. The hydroxylation reaction is enhanced by maintaining a sufficient amount of a carbon source in the culture medium-reaction medium to maintain the ammonium level below 300 ppm. during the bioconversion phase. Employment of a mutant strain of A. parasiticus which was isolated following ultraviolet light mutagenesis to reduce its tendency to produce aflatoxins is preferred.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: September 17, 1991
    Assignee: General Electric Company
    Inventors: James L. Spivack, David P. Mobley, David K. Dietrich, Joseph J. Salvo