Granted Patent
Utility
US 4,315,237 · App. 06/098,711
PTC Devices comprising oxygen barrier layers
Inventors:
Lee M. Middleman, Alan J. Gotcher
Patented Case
View Patent ↗
Granted: Feb 9, 1982
Filed: Nov 30, 1979
Inventors
Lee M. Middleman
Alan J. Gotcher
Assignee (at issue)
Raychem Limited
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.