Patents by Inventor Barthold von Schrader

Barthold von Schrader 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).

  • Inhaler device
    Patent number: 5598835
    Abstract: An inhaler device has a vessel containing the substance to be inhaled and a lid helping to vaporize the substance to be inhaled. The lid includes a generally central opening and several openings positioned in a ring around the central opening. The central opening is formed such that it extends deeper in the vessel than the several openings that are arranged in a ring. The cross-sectional area of the central opening are generally equal to the sum of the cross-sectional areas of the several openings for enabling a sufficient quantity air to be drawn into the several openings to vaporize the substance to be inhaled.
    Type: Grant
    Filed: August 12, 1994
    Date of Patent: February 4, 1997
    Inventor: Barthold von Schrader