Patents by Inventor Bertil Hillgren Ulf

Bertil Hillgren Ulf 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).

  • Drug formulation with ion-exchangers
    Patent number: 5643560
    Abstract: The invention relates to the use of, and methods to obtain, ion exchanger complexes with psychotropic drugs for reducing toxic side effects and lethality when overdosing the drug. The invention includes methods and compositions for modifying the total amount of drug released from the complex in the gastro-intestinal tract by adding a substance which affects the ion exchange process. The additional substance may be a salt which generates an ion with higher or similar affinity to the ion exchanger when compared to the drug. The additional substance may be a counter ion in an additional complex with an ion exchanger.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: July 1, 1997
    Assignee: Pharmacia & Upjohn AB
    Inventors: Carl-Aage Bergwitz-Larsen, deceased, Bertil Hillgren Ulf, Anders Ragnarsson Gert