Patents by Inventor Jacques Andre Pontigny

Jacques Andre Pontigny 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).

  • Particle sizing apparatus
    Patent number: 3982183
    Abstract: Apparatus for obtaining automatically the distribution of volume or mass of particles suspended in a sample. The sample is analyzed in successive sequences or sections each representing a magnitude of given particles. A counter is provided for counting the particles in the sections, and a measuring circuit determines a value which is proportional to the time required by the counter to obtain the number of counted particles. The values are transmitted by a differential circuit to a display device which records directly, such as in a graph, the distribution of the particles in the sample.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: September 21, 1976
    Assignee: Coulter Electronics, Inc.
    Inventors: Claude Jean Collineau, Jacques Andre Pontigny