Granted Patent
Utility
US 6,590,108 · App. 10/065,473
Methods for the preparation of dianhydrides
Inventors:
Roy Ray Odle, Thomas Link Guggenheim, William J. Swatos, Michael J. Vollmer
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Oct 22, 2002
Inventors
Roy Ray Odle
Thomas Link Guggenheim
William J. Swatos
Michael J. Vollmer
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.