Granted Patent
Utility
US 5,286,429 · App. 07/734,836
High melt index polystyrene foam and method
Inventors:
James E. Blythe, Edward A. Colombo, Charles M. Krutchen, Phillip A. Williams, Wen P. Wu
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Jul 24, 1991
Inventors
James E. Blythe
Edward A. Colombo
Charles M. Krutchen
Phillip A. Williams
Wen P. Wu
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.