Granted Patent
Utility
US 4,532,283 · App. 06/421,787
Aromatic carbonate polymer composition
Inventor:
Ping Y. Liu
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Sep 23, 1982
Inventor
Ping Y. Liu
Assignee (at issue)
General Electric 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.