Patents by Inventor Kajsa M. Silfverstrand

Kajsa M. Silfverstrand 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).

  • Pharmaceutical preparation and a process for its preparation
    Patent number: 4942040
    Abstract: Preparation giving a controlled and extended release of both a dihydropyridine, e.g. felodipine and a .beta.-adrenoreceptor antagonist, namely metoprolol as well as a method for the manufacture of the new preparation.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: July 17, 1990
    Assignee: Aktiebolaget Hassle
    Inventors: Gert A. Ragnarsson, Kajsa M. Silfverstrand, John A. Sjogren