Granted Patent
Utility
US 4,474,166 · App. 06/390,671
Wick heaters
Inventors:
Robert F. Shaftner, Michael Kagan
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Jun 21, 1982
Inventors
Robert F. Shaftner
Michael Kagan
Assignee (at issue)
Koehring 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.