Granted Patent
Utility
US 4,394,467 · App. 06/276,108
Sized carbon fibers capable of use with polyimide matrix
Inventor:
Robert Edelman
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Jun 22, 1981
Inventor
Robert Edelman
Assignee (at issue)
Celanese GmbH
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.