Patents by Inventor Helmut Salewski

Helmut Salewski 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).

  • Holding tank for waste fluids and process for disposing of waste fluids from recreational vehicles
    Patent number: 4697609
    Abstract: An in-ground holding tank to collect sewage and grey water from recreational vehicles in areas where central sewer facilities are not feasible. The holding tank has a typical volume of 60-100 gallons and is made of non-corrosive material. The tank contains input and removal assemblies, a pressure release valve, and may contain a volume gauge.
    Type: Grant
    Filed: September 2, 1986
    Date of Patent: October 6, 1987
    Inventor: Helmut Salewski