Granted Patent
Utility
US 6,228,970 · App. 09/400,768
Poly (biphenyl ether sulfone)
Inventor:
Selvaraj Savariar
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Sep 22, 1999
Inventor
Selvaraj Savariar
Assignee (at issue)
BP Amoco Corp.
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.