Patents by Inventor Mark Janicki

Mark Janicki 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).

  • Smoke detector ionisation chamber using nickel-63 source
    Patent number: 4336454
    Abstract: A smoke sensing detector of the dual ionisation region type, including an inner electrode, an outer electrode, and a collector electrode mounted on the inner electrode by means of pillers of insulating material, a first ionisation region being formed by the outer electrode and the collector electrode, and a second or reference ionisation region being formed by the inner electrode and the collector electrode, wherein the collector electrode supports or incorporates a nickel-63 radioactive source emitting radiation into both ionisation regions.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: June 22, 1982
    Assignee: The Radiochemical Centre Limited
    Inventors: Jack Bryant, Mark Janicki