Granted Patent
Utility
US 6,420,444 · App. 09/836,611
Tetrafunctional initiator
Inventor:
Steven M. Krupinski
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Apr 16, 2001
Inventor
Steven M. Krupinski
Assignee (at issue)
NOVA Chemicals 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.