Granted Patent
Utility
US 4,874,469 · App. 07/089,887
Heated extended nip press with porous roll layers
Inventors:
Jeffrey H. Pulkowski, Elizabeth A. Macklem, L. H. Busker
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Aug 27, 1987
Inventors
Jeffrey H. Pulkowski
Elizabeth A. Macklem
L. H. Busker
Assignee (at issue)
Beloit Corporation
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.