Patents by Inventor Donald F. Ryder

Donald F. Ryder 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).

  • Disinfection system for a pressurized flush toilet in a recreational vehicle or the like
    Patent number: 4262372
    Abstract: A fluid or liquid powered pump system useful for injecting a liquid additive into a main stream of liquid flowing through the pump with the additive being pumped into the main liquid stream by movement of the liquid through the pump. The system has a pump body through which the main stream of liquid flows and in which the additive is injected into the liquid stream. The system further includes an unvented additive tank or bottle connected to the pump body by means of a single line.
    Type: Grant
    Filed: June 5, 1979
    Date of Patent: April 21, 1981
    Inventor: Donald F. Ryder