Granted Patent
Utility
US 4,991,720 · App. 07/434,474
Apparatus for dividing a suspension of fibrous cellulose pulp
Inventors:
Ronny Hoglund, Lars Jacobsson
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Nov 14, 1989
Inventors
Ronny Hoglund
Lars Jacobsson
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.