Granted Patent
Utility
US 4,382,957 · App. 05/636,373
Symmetrical insecticidal bis-carbamate compounds
Inventor:
Themistocles D. J. D'Silva
Patented Case
View Patent ↗
Granted: May 10, 1983
Filed: Dec 1, 1975
Inventor
Themistocles D. J. D'Silva
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.