Patents Assigned to Herguth Laboratories
  • Patent number: 5313824
    Abstract: An apparatus for analyzing lubricating oil is disclosed in the form of a test medium upon which an oil sample is placed, and comparative visual indicia which the user consults to provide a qualitative analysis of the oil sample. A method for the use of the apparatus is also disclosed.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: May 24, 1994
    Assignee: Herguth Laboratories
    Inventors: William R. Herguth, Peter Yates