Granted Patent
Utility
US 5,286,457 · App. 07/858,812
Reactor with surface agitator for solution polymerization process
Inventors:
Gary L. Woodson, Brian W. Walther, Brian G. Witt, Gary R. Marchand
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Mar 27, 1992
Inventors
Gary L. Woodson
Brian W. Walther
Brian G. Witt
Gary R. Marchand
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.