Granted Patent
Utility
US 5,498,749 · App. 08/139,672
Process for separating cyclohexane dimethanol from dimethyl terephthalate
Inventors:
William H. Heise, Daniel Folk, Cheuk C. Yau, Chester Wayne Sink
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Oct 22, 1993
Inventors
William H. Heise
Daniel Folk
Cheuk C. Yau
Chester Wayne Sink
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.