Granted Patent
Utility
US 4,534,889 · App. 06/468,768
PTC Compositions and devices comprising them
Inventors:
Peter H. van Konynenburg, Bernard J. Lyons, Robert Smith-Johannsen, Wendell W. Moyer
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Feb 22, 1983
Inventors
Peter H. van Konynenburg
Bernard J. Lyons
Robert Smith-Johannsen
Wendell W. Moyer
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.