Granted Patent
Utility
US 4,476,077 · App. 06/331,055
Process for preparing a poly(p-methylstyrene) foam
Inventors:
Edward M. Bullard, Daniel J. DiBiasi, Frank J. Feeney
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Dec 16, 1981
Inventors
Edward M. Bullard
Daniel J. DiBiasi
Frank J. Feeney
Assignee (at issue)
Mobil Oil Corporation
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.