Granted Patent
Utility
US 5,573,459 · App. 08/444,639
Two stage shaker
Inventor:
David Meester
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: May 19, 1995
Inventor
David Meester
Assignee (at issue)
FMC CORPORATION
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.