Granted Patent
Utility
US 6,158,427 · App. 09/281,372
Thermal cell having an oxygen permeable top sheet and a method of making a gas permeable material
Inventors:
Kenneth Stephen McGuire, Peter W. Hamilton
Patented Case
View Patent ↗
Granted: Dec 12, 2000
Filed: Mar 30, 1999
Inventors
Kenneth Stephen McGuire
Peter W. Hamilton
Assignee (at issue)
The Procter & Gamble Company
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.