Granted Patent
Utility
US 4,541,981 · App. 06/504,013
Method for preparing a uniform polyolefinic microporous hollow fiber
Inventors:
James J. Lowery, Neil Plotkin, Jack Robinson
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Jun 13, 1983
Inventors
James J. Lowery
Neil Plotkin
Jack Robinson
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.