Patents by Inventor Herman M. Hoogstraat

Herman M. Hoogstraat 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).

  • Method and apparatus for determining the hydrogen content of a gas
    Patent number: 4346583
    Abstract: Determining the hydrogen content of the expiratory air of a person using a sample holder and a hydrogen detector. Expiratory air is passed through the sample holder in order to obtain an expiratory air sample. A pressurized gas is then introduced into the sample holder and directs the expiratory air through the hydrogen detector at a fixed flow rate as determined by the pressure of the pressurized gas.
    Type: Grant
    Filed: June 6, 1979
    Date of Patent: August 31, 1982
    Inventor: Herman M. Hoogstraat