Granted Patent
Utility
US 4,945,155 · App. 07/350,668
Preparation of low color copoly(arylene sulfide) by heating copoly(arylene sulfide)
Inventors:
David R. Fagerburg, Mark Rule, Joseph J. Watkins, Paul B. Lawrence
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: May 11, 1989
Inventors
David R. Fagerburg
Mark Rule
Joseph J. Watkins
Paul B. Lawrence
Assignee (at issue)
EASTMAN KODAK COMPANY
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.