Patents by Inventor Hansruedi Kiefer

Hansruedi Kiefer 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).

  • Process for isolating nucleic acids utilizing protease digestion
    Patent number: 5063162
    Abstract: A process for the isolation of nucleic acids from cell or tissue extracts by precipitating the nucleic acids with a water-soluble ketone, preferably with acetone, optionally in the presence of dimethylformamide or formamide.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: November 5, 1991
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Hansruedi Kiefer
  • Process for isolating nucleic acids
    Patent number: 4946952
    Abstract: A process for the isolation of nucleic acids from cell or tissue extracts by precipitating the nucleic acids with a water-soluble ketone, preferably with acetone, optionally in the presence of dimethylformamide or formamide.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: August 7, 1990
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Hansruedi Kiefer