Granted Patent
Utility
US 4,877,862 · App. 07/337,712
Solid state polymerization process for increasing the molecular weight of colpoly(arylene sulfide)
Inventors:
David R. Fagerburg, Joseph J. Watkins
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Apr 13, 1989
Inventors
David R. Fagerburg
Joseph J. Watkins
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.