Granted Patent
Utility
US 5,863,992 · App. 08/768,870
Tetraphenols and their use as polycarbonate branching agents
Inventors:
Patrick Joseph McCloskey, David Michel Dardaris, Yegang Lin, Pin-pin Wu, Jimmy Lynn Webb
Patented Case
View Patent ↗
Granted: Jan 26, 1999
Filed: Dec 17, 1996
Inventors
Patrick Joseph McCloskey
David Michel Dardaris
Yegang Lin
Pin-pin Wu
Jimmy Lynn Webb
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.