Granted Patent
Utility
US 5,087,677 · App. 07/548,083
Process for the preparation of cycloolefin polymers
Inventors:
Michael-Joachim Brekner, Jurgen Rohrmann, Walter Spaleck, Martin Antberg
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Jul 5, 1990
Inventors
Michael-Joachim Brekner
Jurgen Rohrmann
Walter Spaleck
Martin Antberg
Assignee (at issue)
Hoechst GmbH
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.