Granted Patent
Utility
US 4,791,147 · App. 07/121,497
Non-crosslinked foam
Inventors:
Haruhiko Tanaka, Fukashi Kagawa, Kouji Nakashima
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Nov 16, 1987
Inventors
Haruhiko Tanaka
Fukashi Kagawa
Kouji Nakashima
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.