Patents by Inventor John Peter Doering

John Peter Doering 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).

  • Greenhouse door assembly
    Patent number: 4120341
    Abstract: A door assembly suitable for relatively large openings such as greenhouse ends which comprises upper and lower door panels hinged together at the middle of the door with the upper panel hinged to the upper door frame. The door is counter-weighted and can readily be raised and lowered, even under windy conditions.
    Type: Grant
    Filed: September 7, 1977
    Date of Patent: October 17, 1978
    Assignee: Union Carbide Corporation
    Inventor: John Peter Doering