Patents by Inventor Donald W. Nibbelink

Donald W. Nibbelink 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).

  • Controlled release combination of carbidopa/levodopa
    Patent number: 4983400
    Abstract: A matrix or monolithic drug delivery system for the controlled release of carbidopa and levodopa consists of the two drugs uniformly dispersed in a polymer vehicle at a concentration that is greater than the solubility of either drug in the polymer. Treatment of parkinsonism with the controlled release formulation provides several advantages over treatment with the standard carbidopa/levodopa combination presently employed.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: January 8, 1991
    Assignee: Merck & Co., Inc.
    Inventors: Robert E. Dempski, Edward C. Scholtz, Donald W. Nibbelink, Scott A. Reines
  • Controlled release combination of carbidopa/levodopa
    Patent number: 4900755
    Abstract: A matrix or monolithic drug delivery system for the controlled release of carbidopa and levodopa consists of the two drugs uniformly dispersed in a polymer vehicle at a concentration that is greater than the solubility of either drug in the polymer. Treatment of parkinsonism with the controlled release formulation provides several advantages over treatment with the standard carbidopa/levidopa combinations presently employed.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: February 13, 1990
    Assignee: Merck & Co.
    Inventors: Robert E. Dempski, Edward C. Scholtz, Donald W. Nibbelink, Scott A. Reines
  • Controlled release combination of carbidopa/levodopa
    Patent number: 4832957
    Abstract: A matrix or monolithic drug delivery system for the controlled release of carbidopa and levodopa consists of the two drugs uniformly dispersed in a polymer vehicle at a concentration that is greater than the solubility of either drug in the polymer. Treatment of parkinsonism with the controlled release formulation provides several advantages over treatment with the standard carbidopa/levodopa combinations presently employed.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: May 23, 1989
    Assignee: Merck & Co., Inc.
    Inventors: Robert E. Dempski, Edward C. Scholtz, Donald W. Nibbelink, Scott A. Reines