Granted Patent
Utility
US 4,489,543 · App. 06/329,488
Self-crimping yarn
Inventors:
James E. Bromley, John R. Dees, Harold M. Familant, Wayne T. Mowe, Darwyn E. Walker
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Dec 10, 1981
Inventors
James E. Bromley
John R. Dees
Harold M. Familant
Wayne T. Mowe
Darwyn E. Walker
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.