Granted Patent
Utility
US 6,502,977 · App. 09/653,632
Extruder plant with worm extruder and gearwheel extruder
Inventor:
Gerd Capelle
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Sep 1, 2000
Inventor
Gerd Capelle
Assignee (at issue)
Atecs Mannesmann AG
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.