Granted Patent
Utility
US 5,739,257 · App. 08/734,769
Binary phase transfer/amine catalyst for making aromatic polycarbonates
Inventors:
Eugene Pauling Boden, Larry I. Flowers, Peter D. Phelps, David L. Ramsey, Paul Dean Sybert
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Oct 21, 1996
Inventors
Eugene Pauling Boden
Larry I. Flowers
Peter D. Phelps
David L. Ramsey
Paul Dean Sybert
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.