Granted Patent
Utility
US 5,215,374 · App. 07/691,268
Plasticizing sections of cold feed rubber extruders
Inventor:
Paul Meyer
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Apr 25, 1991
Inventor
Paul Meyer
Assignee (at issue)
Frenkel CD Ltd
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.