IP Library › Granted Patent US 6,719,909
Granted Patent Utility
US 6,719,909 · App. 10/114,900

Band gap plasma mass filter

Inventor: Tihiro Ohkawa
Patented Case View Patent ↗
Granted: Apr 13, 2004 Filed: Apr 2, 2002
Inventor
Tihiro Ohkawa
Assignee (at issue)
Archimedes Technology Group, 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 6,719,909
App. No.
10/114,900
Filed
2002-04-02
Granted
2004-04-13
Kind
B2