Granted Patent
Utility
US 5,221,743 · App. 07/844,265
Process for producing isocyanurates by cyclotrimerizing isocyanates using polymer-bound catalysts
Inventors:
Stephen L. Goldstein, Curtis P. Smith
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Mar 2, 1992
Inventors
Stephen L. Goldstein
Curtis P. Smith
Assignee (at issue)
Olin 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.