Patents by Inventor Wilhelm Meyer

Wilhelm Meyer 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).

  • Invalid wheel-chair
    Patent number: 4033624
    Abstract: A wheeled invalid-chair has leg-supports provided with levers for an invalid seated in the chair to adjust the inclination of the leg-supports. Each leg-support comprises a carrier spar pivoted at its upper end to the chair frame and supporting a foot rest at its lower end and a leg rest intermediate its ends. The lever is hinged to the carrier-spar, and can be swung from a position along-side the carrier-spar to engage an abutment provided by the rounded upper end of the carrier spar for adjusting the pivotal position of the leg support relative to the frame by pulling on the lever. A locking mechanism is connected between each leg support and the frame for locking the leg-support in the adjusted position.
    Type: Grant
    Filed: June 2, 1976
    Date of Patent: July 5, 1977
    Inventor: Wilhelm Meyer Jun
  • Method for making water dispersible aluminum hydroxide
    Patent number: 4010247
    Abstract: Water dispersible aluminum hydroxide is prepared by treating an acid dispersible aluminum hydroxide with 1 to 9 weight % of a gaseous acid.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: March 1, 1977
    Assignee: CONDEA Petrochemie-Gesellschaft m.b.H.
    Inventors: Martin Wilhelm Wassermann, Arnold Wilhelm Meyer