Granted Patent
Utility
US 5,285,251 · App. 07/512,792
Apparatus and methods for optical emission spectroscopy
Inventors:
Francis Pilloud, Wilfried Vogel
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Apr 23, 1990
Inventors
Francis Pilloud
Wilfried Vogel
Assignee (at issue)
Fisons plc
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.