Patents by Inventor Daniel Y. Bieri

Daniel Y. Bieri 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).

  • Device and process for concentrating biologic specimens in liquid form
    Patent number: 5240861
    Abstract: A device for concentrating liquid specimens and the process of using the device. The device has a receptacle containing a membrane. The sample to be concentrated is placed in the receptacle on the upper surface of the membrane. A piston is then screwed down toward the upper surface of the membrane increasing the pressure above the membrane. The process for using the device involves supporting the device at a small angle from the vertical so that once the specimen has been concentrated to a given volume, the tilted membrane is exposed allowing air to reach the membrane and equalizing the pressure thereby rapidly decreasing any further concentration.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: August 31, 1993
    Assignee: Spectrum Medical Industries, Inc.
    Inventor: Daniel Y. Bieri