Granted Patent
Utility
US 6,201,979 · App. 09/523,826
Chemical signal-impermeable mask
Inventors:
Ronald T. Kurnik, Janet Tamada, Michael J. Tierney
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Mar 13, 2000
Inventors
Ronald T. Kurnik
Janet Tamada
Michael J. Tierney
Assignee (at issue)
Cygnus, 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.