Patents by Inventor Jani-Emanuel Vuorenpaa

Jani-Emanuel Vuorenpaa 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).

  • Composition for pH dependent controlled release of active ingredients and methods for producing it
    Patent number: 5656292
    Abstract: The present invention is related to a composition for pH dependent or pH regulated controlled release of active ingredients especially drugs. The composition consists of a compactible mixture of the active ingredient and starch molecules substituted with acetate and dicarboxylate residues. The preferred dicarboxylate acid is succinate. The average substitution degree of the acetate residue is at least 1 and 0.2-1.2 for the dicarboxylate residue. The starch molecules can have the acetate and dicarboxylate residues attached to the same starch molecule backbone or attached to separate starch molecule backbones. The present invention also discloses methods for preparing said starch acetate dicarboxylates by transesterification or mixing of starch acetates and starch dicarboxylates respectively.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: August 12, 1997
    Assignee: Alko Group Ltd.
    Inventors: Arto Olavi Urtti, Soili Hellevi Peltonen, Timo Petteri Paronen, Leena Johanna Nakari, Jani-Emanuel Vuorenpaa