Patents by Inventor Wolfram Shiemann

Wolfram Shiemann 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).

  • Screw cap for canisters
    Patent number: 5097992
    Abstract: A screw for a plastic canister cap has a through airhole that opens into an annular channel in the base of the cap. The end positions of an external thread on the pouring nozzle and an internal thread on an annular wall of the screw cap are matched to one another and at least two through airholes are provided in the annular channel so that one of the airholes is always at least in the vicinity of the through hole of the pouring nozzle.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: March 24, 1992
    Inventor: Wolfram Shiemann