Granted Patent
Utility
US 4,361,675 · App. 06/239,273
Compatible polystyrene blends
Inventors:
King-Han Tan, Jan L. de Greef
Patented Case
View Patent ↗
Granted: Nov 30, 1982
Filed: Mar 2, 1981
Inventors
King-Han Tan
Jan L. de Greef
Assignee (at issue)
BorgWarner Inc.
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.