Patents by Inventor Calvin L. Pulscher

Calvin L. Pulscher 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).

  • Patent number: 5595030
    Abstract: An aparatus adapted to be mounted on a sewer vent stack to inhibit frost buildup in cold weather including a supporting frame containing a central rotatable shaft with a wind turbine on the end exposed and four vanes on the end within the vent pipe. The rotation of the shaft will cause frost build up to be scraped off by the vanes. Lack of rotation in a breeze will indicate excessive build up and a possibly dangerous situation.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: January 21, 1997
    Inventor: Calvin L. Pulscher