Granted Patent
Utility
US 4,622,352 · App. 06/814,705
Low smoke modified polypropylene insulation compositions
Inventors:
Lie K. Djiauw, Ronald D. Icenogle
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Dec 30, 1985
Inventors
Lie K. Djiauw
Ronald D. Icenogle
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.