Granted Patent
Utility
US 4,861,966 · App. 06/864,930
Method and apparatus for electrically heating diesel fuel utilizing a PTC polymer heating element
Inventors:
Martin Matthiesen, Michelle Small
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: May 19, 1986
Inventors
Martin Matthiesen
Michelle Small
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.