Granted Patent
Utility
US 5,281,343 · App. 08/048,222
Vacuum filtration system and method of filtering pulp fibers from pulp slurry using the same
Inventors:
Frederick S. Lewis, Lewis F. Empie, Rollin E. Brown
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Apr 20, 1993
Inventors
Frederick S. Lewis
Lewis F. Empie
Rollin E. Brown
Assignee (at issue)
Ingersoll-Rand Company
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.