Granted Patent
Utility
US 4,670,610 · App. 06/710,085
Preparation of 2,5-dichlorophenol
Inventor:
Richard Sehring
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Mar 11, 1985
Inventor
Richard Sehring
Assignee (at issue)
Sandoz AG
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.