Granted Patent
Utility
US 6,358,428 · App. 09/627,931
Method of etching
Inventors:
Roy V. Leverenz, John Bost
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Jul 28, 2000
Inventors
Roy V. Leverenz
John Bost
Assignee (at issue)
TDY Industries, LLC
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.