Granted Patent
Utility
US 4,436,665 · App. 06/426,733
Two solvent process for preparation of esters of 3,5-dibromo-4-hydroxybenzonitrile
Inventors:
Richard E. Sheads, David A. Segal
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Sep 29, 1982
Inventors
Richard E. Sheads
David A. Segal
Assignee (at issue)
Union Carbide 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.