Patents by Inventor Roy T. Martin

Roy T. Martin 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).

  • Removal of explosive or combustible gas or vapors from tanks and other enclosed spaces
    Patent number: 4446923
    Abstract: A method of purging an enclosed space of an explosive or combustible gas or vapor comprises filling the space with a foam the bubbles of which are filled with a preprepared gaseous mixture of air and a non-toxic fire-suppressant gas, such as bromotrifluoromethane, in predetermined proportions and allowing the foam to decay. The proportions of air and said fire-suppressant gas in the gaseous mixture are such that when the foam decays the gaseous mixture remaining in the tank and freed by the decay of the foam is capable of supporting human life.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: May 8, 1984
    Assignee: Walter Kidde & Co., Inc.
    Inventor: Roy T. Martin