Granted Patent
Utility
US 4,705,902 · App. 06/862,001
DDTR-free 1,1-bis(chlorophenyl)-2,2,2-trichloroethanol
Inventors:
Richard Walter Nichols, William Zabrodski, Abhijit Mitra
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: May 15, 1986
Inventors
Richard Walter Nichols
William Zabrodski
Abhijit Mitra
Assignee (at issue)
Rohm and Haas Company
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.