Granted Patent
Utility
US 5,397,851 · App. 08/149,433
Process for cis-1,4-polybutadiene production with reduced gel formation
Inventors:
Thomas Knauf, Akhtar Osman
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Nov 9, 1993
Inventors
Thomas Knauf
Akhtar Osman
Assignee (at issue)
Polysar Rubber 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.