Granted Patent
Utility
US 5,466,765 · App. 08/401,375
Vaccum system for controlling pressure in a polyester process
Inventors:
Douglas M. Haseltine, Thomas Lloyd Yount, Jimmy L. Ryans
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Mar 9, 1995
Inventors
Douglas M. Haseltine
Thomas Lloyd Yount
Jimmy L. Ryans
Assignee (at issue)
Eastman 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.