Granted Patent
Utility
US 5,772,854 · App. 08/516,374
Use of paired reboilers in the purification of propylene oxide by extractive distillation
Inventors:
William P. Nelson, Mark E. Taylor
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Aug 17, 1995
Inventors
William P. Nelson
Mark E. Taylor
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.