Granted Patent
Utility
US 6,095,381 · App. 09/029,430
Self-closing seal with a sealing membrane
Inventor:
Sigurd Schwanenberg
Patented Case
View Patent ↗
Granted: Aug 1, 2000
Filed: Apr 16, 1998
Inventor
Sigurd Schwanenberg
Assignee (at issue)
Zeller Plastik GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.