Granted Patent
Utility
US 4,570,029 · App. 06/707,998
Process for separating isoprene
Inventors:
Santi Kulprathipanja, Chin-Hsiung Chang
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Mar 4, 1985
Inventors
Santi Kulprathipanja
Chin-Hsiung Chang
Assignee (at issue)
UOP LLC
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.