Granted Patent
Utility
US 5,300,772 · App. 07/923,093
Quadruple ion trap method having improved sensitivity
Inventor:
Sidney E. Buttrill, Jr.
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Jul 31, 1992
Inventor
Sidney E. Buttrill, Jr.
Assignee (at issue)
Varian, 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.