Patents by Inventor H. Dinsmore Madill

H. Dinsmore Madill 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).

  • Compressed breathing air sampling device
    Patent number: 4461184
    Abstract: A compressed gas sampling device is shown which includes a pressure reducing orifice to permit collection of a gas sample at a low pressure. A filter cartridge is connected between a flow meter and a pressurized source for analysis and gas is passed through the cartridge for a predetermined period of time. The cartridge may then be analyzed by a laboratory to determine contaminants which may be present in the source gas under analysis.
    Type: Grant
    Filed: July 8, 1982
    Date of Patent: July 24, 1984
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventors: Shri K. Gandhi, H. Dinsmore Madill