Granted Patent
Utility
US 5,773,634 · App. 08/749,190
Tertiary butyl alcohol absorption process for recovering propylene and isobutane
Inventors:
David Durham Chess, David G. Pottratz, Eileen T. Nguyen, William K. Culbreth, III
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Nov 14, 1996
Inventors
David Durham Chess
David G. Pottratz
Eileen T. Nguyen
William K. Culbreth, III
Assignee (at issue)
Huntsman Specialty Chemicals 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.