Granted Patent
Utility
US 4,282,177 · App. 06/099,061
Method for reducing sharkskin melt fracture during extrusion of ethylene polymers
Inventors:
Stuart J. Kurtz, Theodore R. Blakeslee, III, Leonard S. Scarola
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Dec 12, 1979
Inventors
Stuart J. Kurtz
Theodore R. Blakeslee, III
Leonard S. Scarola
Assignee (at issue)
Union Carbide Corporation
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.