Patents by Inventor John M. McAndless

John M. McAndless 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).

  • Automated thermal desorption unit
    Patent number: 4976924
    Abstract: A thermal desorption unit includes a base plate and a pair of spaced apart plates arranged perpendicularly to the base plate and positioned to hold a magazine of tubes between the spaced apart plates. The unit includes apparatus for selectively extracting, handling, heating, and reinserting a tube from the magazine. The tubes are heated to drive off the contents and flushed to clean the inside of the tubes.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: December 11, 1990
    Assignee: Her Majesty the Queen in Right of Canada, as represented by the Minister of National Defence
    Inventors: John M. McAndless, James R. Hancock, Donald B. Barnett, Orville J. Olm, Terry J. A. Locke, John Maybank
  • "Polymer packed minitube vapor sampling system"
    Patent number: 4869117
    Abstract: An air sampler includes a magazine having a plurality of sampling tubes, and an inlet and an outlet at a sampling position. A tube advancing mechanism sequentially advances the sampling tubes to and from the sampling position. A tube sealing arrangement is provided at the sampling position. An air pump draws air through the inlet, a sampling tube at the sampling position, and the outlet. A control sequentially operates the magazine, obtaining air samples within the sampling tubes.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: September 26, 1989
    Assignee: Her Majesty the Queen in Right of Canada as represented by the Minister of National Defence
    Inventors: John M. McAndless, James R. Hancock, Donald B. Barnett, Orville J. Olm, Terry J. A. Locke, John Maybank
  • Constant pressure/G-force diffusion cell system
    Patent number: 4548072
    Abstract: The invention disclosed is a device for monitoring the penetration of vapor from a challenge liquid occluded by a garment material, through the garment material, wherein pressure is applied against the garment material. The vapor which penetrates through the garment material is picked up by an inert carrier gas and detected to determine the protection afforded by the garment material against penetration by the challenge liquid/vapor.
    Type: Grant
    Filed: August 3, 1984
    Date of Patent: October 22, 1985
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventor: John M. McAndless
  • Fabric treatment with ultrasound
    Patent number: 4302485
    Abstract: A method and apparatus for the treatment of fabric materials with a liquid finishing agent such as a liquid repellant is disclosed. The method involves passing a strip of the fabric through a bath of the liquid finishing agent across a stationary fabric contacting surface. In the preferred embodiment, the fabric is subjected to ultra-sonic energy while immersed in the bath at a power level and frequency such that cavitation occurs in the bath adjacent the submerged material.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: November 24, 1981
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventors: Anthony J. Last, John M. McAndless