Granted Patent
Utility
US 6,790,934 · App. 10/034,866
Method for purification of aromatic polyethers
Inventors:
Norman Johnson, Raul Eduardo Ayala, Thomas Joseph Fyvie, Amy Rene Freshour, David Woodruff, Peter D. Phelps, Ganesh Kailasam, Paul Edward Howson, Elliott West Shanklin, Lioba Maria Kloppenburg, David Bruce Hall, Pradeep Nadkarni, Daniel J. Brunelle
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Dec 21, 2001
Inventors
Norman Johnson
Raul Eduardo Ayala
Thomas Joseph Fyvie
Amy Rene Freshour
David Woodruff
Peter D. Phelps
Ganesh Kailasam
Paul Edward Howson
Elliott West Shanklin
Lioba Maria Kloppenburg
David Bruce Hall
Pradeep Nadkarni
Daniel J. Brunelle
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.