Granted Patent
Utility
US 5,922,921 · App. 08/957,914
Process for the production of n-butanol
Inventors:
Jerry D. Unruh, Debra A. Ryan, Shannon Dugan
Patented Case
View Patent ↗
Granted: Jul 13, 1999
Filed: Oct 27, 1997
Inventors
Jerry D. Unruh
Debra A. Ryan
Shannon Dugan
Assignee (at issue)
Celanese International 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.