Granted Patent
Utility
US 5,052,588 · App. 07/528,684
Ampule having a fracturing outlet end, a swellable piston and a breakable end for gaining access to the piston
Inventor:
Mark S. Schlosser
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: May 24, 1990
Inventor
Mark S. Schlosser
Assignee (at issue)
SpaceLabs, Inc.
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.