Granted Patent
Utility
US 5,145,563 · App. 07/786,687
Dehydration of propylene oxide by extracting distillation
Inventors:
William K. Culbreth, III, David G. Pottratz, Wei-Yang Su, Yu-Hwa E. Sheu, Carter G. Naylor
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Nov 1, 1991
Inventors
William K. Culbreth, III
David G. Pottratz
Wei-Yang Su
Yu-Hwa E. Sheu
Carter G. Naylor
Assignee (at issue)
Texaco Chemical Inc.
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.