Granted Patent
Utility
US 5,630,874 · App. 08/481,722
Apparatus for resin impregnation of a fibrous substrate
Inventors:
Robert A. Tait, Walter R. Stelling, John J. Hartley, Jr., Donald M. Chevako
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: Jun 7, 1995
Inventors
Robert A. Tait
Walter R. Stelling
John J. Hartley, Jr.
Donald M. Chevako
Assignee (at issue)
SHELL OIL 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.