Granted Patent
Utility
US 6,019,871 · App. 09/069,957
Effective utilization of sap in producing non-woven webs using the foam process
Inventors:
Kay Rokman, Juhani Jansson, Eino Laine
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Apr 30, 1998
Inventors
Kay Rokman
Juhani Jansson
Eino Laine
Assignee (at issue)
Ahlstrom Paper Group Oy
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.