Granted Patent
Utility
US 4,986,480 · App. 07/373,065
Method and apparatus for feeding a conical refiner
Inventors:
Johan Gullichsen, Bengt Nilsson, Ronny Hoglund
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Jun 29, 1989
Inventors
Johan Gullichsen
Bengt Nilsson
Ronny Hoglund
Assignee (at issue)
Kamyr AB
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.