Patents by Inventor Erwin Bald

Erwin Bald 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).

  • Apparatus for collecting liquid leakage
    Patent number: 5238033
    Abstract: Apparatus for collecting liquid leakage when the liquid is supplied to an underground storage tank holding fuel, heating oil and the like, includes a liquid leakage resistant flexible recovery bag (13) located around and sealed to a filling pipe (4) extending into the tank (1). The recovery bag (13) is positioned within a dome pit (10) and is located between the dome lid (3) and a cover (12) on the dome pit (10).
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: August 24, 1993
    Inventor: Erwin Bald