Patents by Inventor Jeffrey I. Siegel

Jeffrey I. Siegel 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).

  • Closed sample cell for use in flow cytometry
    Patent number: 5160974
    Abstract: A closed flow cell having a cavity with a flexible diaphragm at either end of a flow tube. A sample having particles or biological cells suspended in a fluid is placed within either cavity. Movement of the diaphragm forces the fluid to flow through the flow tube back and forth between the two cavities. Detectors are positioned adjacent the flow tube. A light source, typically a laser, illuminates the flow tube. Scattered light from the light source is detected by the detectors. Various properties of the particle are thereby determined.
    Type: Grant
    Filed: June 25, 1990
    Date of Patent: November 3, 1992
    Assignee: Flow Science, Inc.
    Inventors: Jeffrey I. Siegel, Sidney Braginsky
  • Attic ventilation control system
    Patent number: 4251026
    Abstract: A control system for use with an attic ventilation fan operates to reduce heat buildup during the summer months and also to prevent frost buildup during the winter months by eliminating the cold, moisture-laden, air from the attic. A summer control unit is provided to eliminate the hot air and a winter control unit operates without the need of a humidistat to evacuate the moisture laden cold air during the winter months.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: February 17, 1981
    Assignee: Butler Ventamatic Corp.
    Inventors: Howell T. Siegel, Jeffrey I. Siegel, Richard E. Shank