Granted Patent
Utility
US 5,223,591 · App. 07/776,366
Initiators for polymerization
Inventors:
Johan Nyander, Sonny Jonsson, Bjorn Elman, Ann-Britt Pettersson, Per-Erik Sundell, Sven Göthe, Jan-Erik Nystrom
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Nov 25, 1991
Inventors
Johan Nyander
Sonny Jonsson
Bjorn Elman
Ann-Britt Pettersson
Per-Erik Sundell
Sven Göthe
Jan-Erik Nystrom
Assignee (at issue)
Ciba-Geigy
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.