Granted Patent
Utility
US 4,207,265 · App. 05/563,464
Process for preparing hydroquinone and acetone
Inventor:
Peter S. Carleton
Patented Case
View Patent ↗
Granted: Jun 10, 1980
Filed: Mar 31, 1975
Inventor
Peter S. Carleton
Assignee (at issue)
The Upjohn Co.
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.