Granted Patent
Utility
US 6,141,573 · App. 09/128,891
Chemical signal-impermeable mask
Inventors:
Ronald T. Kurnik, Janet Tamada, Michael J. Tierney
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Aug 4, 1998
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.