Patents by Inventor Paul M. Heim

Paul M. Heim 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).

  • Double tracer gas process for locating conduit leaks
    Patent number: 4189938
    Abstract: A process for locating leaks in an underground protective conduit disposed about a carrier pipe, and comprising the insertion of a double tracer gas into the protective conduit for the purpose of detecting leaks in the protective conduit. The process comprises the use of a double tracer gas which includes about two and one-half (21/2) to ten (10) percent methane and about ninety (90) to ninety-seven and one-half (971/2) percent argon.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: February 26, 1980
    Assignee: Heath Consultants, Incorporated
    Inventor: Paul M. Heim