Granted Patent
Utility
US 5,342,908 · App. 08/014,295
Process for preparing halobutyl-type polymer
Inventor:
Akhtar Osman
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Feb 5, 1993
Inventor
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.