Granted Patent
Utility
US 4,431,850 · App. 06/319,771
Low temperature hydrodealkylation of alkylated phenols
Inventors:
Derk T. A. Huibers, Cheng Yih Jenq
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Nov 9, 1981
Inventors
Derk T. A. Huibers
Cheng Yih Jenq
Assignee (at issue)
HRI
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.