Granted Patent
Utility
US 6,116,576 · App. 09/331,463
Membrane valve with structure for assuring a tight seal in the closed position
Inventors:
Kasper Höglund, Goran Rydin
Patented Case
View Patent ↗
Granted: Sep 12, 2000
Filed: Jun 18, 1999
Inventors
Kasper Höglund
Goran Rydin
Assignee (at issue)
Siemens Elema AB
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.