Patents by Inventor Phillip D. Harrison

Phillip D. Harrison 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).

  • Appartus and method for determining impurities in liquids
    Patent number: 5219525
    Abstract: An apparatus for determining impurities in liquids has a funnel having a first end and a smaller diameter outlet having an outer periphery. A funnel holder releasably holds the funnel. A portable test film carrier, removably engageable with the funnel holder, holds the test film. The test film carrier includes a mechanism for removably securing and releasably tensioning the test film within the test film carrier. A uniform test area is provided on the test film. The apparatus provides a high degree of test result reproducibility.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: June 15, 1993
    Inventor: Phillip D. Harrison