Granted Patent
Utility
US 4,447,657 · App. 06/440,676
Preparation of ortho-alkylated phenols
Inventors:
Bruce E. Firth, Terry J. Rosen
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Nov 10, 1982
Inventors
Bruce E. Firth
Terry J. Rosen
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.