Granted Patent
Utility
US 4,496,427 · App. 06/112,030
Preparation of hydrophilic polyolefin fibers for use in papermaking
Inventor:
Robert Davison
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Jan 14, 1980
Inventor
Robert Davison
Assignee (at issue)
HERCULES LLC
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.