Patents by Inventor Gulu N. Advani

Gulu N. Advani 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).

  • Percent oxygen gauge
    Patent number: 4462246
    Abstract: A gauge measuring percent oxygen by simultaneously measuring oxygen partial pressure and ambient atmospheric pressure with solid state transducers. Two electrical signals obtained from the transducers are combined in a summing amplifier in accord with an empirically determined relation to yield a percent oxygen value which is displayed. The gauge has provisions for using an internal oxygen partial pressure transducer or an external probe connected to the gauge by a cable.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: July 31, 1984
    Assignee: Sierra Monitor Corporation
    Inventors: Gulu N. Advani, Scott A. Amundson, Eli M. Goldfarb
  • Gas measurement method
    Patent number: 4399684
    Abstract: A gas measurement method for metal-oxide gas sensors. The sensors are thermally cycled by sequential heating and cooling. It has been found that a continuous, concentration-dependent, unique signature for different gases is produced during thermal cycling. Once signature patterns are developed for different concentrations, an unknown gas concentration for which a signature pattern exists may be sampled, either by amplitude or time-dependent samples, in order to identify the gas in its concentration.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: August 23, 1983
    Assignee: Sierra Monitor Corporation
    Inventors: Gulu N. Advani, Robert Beard, Leonard Nanis