Granted Patent
Utility
US 4,522,773 · App. 06/469,326
Process for producing self-crimping polyester yarn
Inventors:
Edgar V. Menezes, John H. Southern, Richard L. Ballman, J. M. Chamberlin
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Feb 24, 1983
Inventors
Edgar V. Menezes
John H. Southern
Richard L. Ballman
J. M. Chamberlin
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.