Granted Patent
Utility
US 4,452,601 · App. 06/360,012
Process for the thermal stabilization of acrylic fibers and films
Inventors:
George L. Collins, Norman W. Thomas
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Mar 19, 1982
Inventors
George L. Collins
Norman W. Thomas
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.