Patents by Inventor David C. Fenimore

David C. Fenimore 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).

  • Gas flow controller
    Patent number: 5329966
    Abstract: There is disclosed a system for delivering gas at a predetermined rate of flow, including a diaphgram type flow controller, a pressure regulator for providing a constant flow of gas to the flow controller, and a microprocessor controlled stepper motor utilizing an optical encoder to adjust the rate of flow of a gas leaving the controller without having to use a gas flow measurement device to monitor the flow rate.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: July 19, 1994
    Assignee: Vici Metronics Incorporated
    Inventors: David C. Fenimore, Walter H. McHenry, James L. Blumberg
  • Apparatus for transferring sample on flexible sheet to chromatographic plate
    Patent number: 4281618
    Abstract: A chemically inert, non-absorptive applicator sheet, a depression defined by a recessed portion of the applicator sheet, a transfer coating on at least a portion of a top surface of the applicator sheet, means for evaporating a solution of sample and carrier solvent deposited on the transfer coating, and a displacement mechanism for displacing a sample formed in the recess are disclosed. The depression in the applicator sheet may be formed by imposing a suction beneath the applicator sheet; and a displacement of a sample formed in the depression may be accomplished by introducing pressure beneath the applicator sheet.
    Type: Grant
    Filed: March 20, 1980
    Date of Patent: August 4, 1981
    Inventor: David C. Fenimore
  • Method for preparing samples for application to a thin layer chromatographic sheet
    Patent number: 4248904
    Abstract: A chemically inert, non-absorptive applicator sheet, a depression defined by a recessed portion of the applicator sheet, a transfer coating on at least a portion of a top surface of the applicator sheet, means for evaporating a solution of sample and carrier solvent deposited on the transfer coating, and a displacement mechanism for displacing a sample formed in the recess are disclosed. The depression in the applicator sheet may be formed by imposing a suction beneath the applicator sheet; and a displacement of a sample formed in the depression may be accomplished by introducing pressure beneath the applicator sheet.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: February 3, 1981
    Inventor: David C. Fenimore