Granted Patent
Utility
US 6,409,180 · App. 09/556,815
Metallic seal
Inventors:
John Loyd Spence, Kevin R. Felber
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Apr 21, 2000
Inventors
John Loyd Spence
Kevin R. Felber
Assignee (at issue)
PerkinElmer, 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.