Granted Patent
Utility
US 6,184,975 · App. 09/195,887
Electrostatic device for correcting chromatic aberration in a particle-optical apparatus
Inventors:
Alexander Henstra, Marcellinus Krijn
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Nov 19, 1998
Inventors
Alexander Henstra
Marcellinus Krijn
Assignee (at issue)
Philips Electron Optics
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.