Granted Patent
Utility
US 5,658,481 · App. 08/714,803
Resistance heating element of thermoplastic materials
Inventors:
Bernhard Pfeiffer, Anne Texier
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Sep 17, 1996
Inventors
Bernhard Pfeiffer
Anne Texier
Assignee (at issue)
Hoechst GmbH
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.