Granted Patent
Utility
US 4,255,342 · App. 06/025,523
Synthesis of phenoxyanthraquinones
Inventor:
Arthur D. Olin
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Apr 2, 1979
Inventor
Arthur D. Olin
Assignee (at issue)
Toms River Chemical Corporation
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.