Granted Patent
Utility
US 5,162,575 · App. 07/678,394
Preparation of isocyanates using a silver salt promoted rearrangement
Inventor:
Ming-Tung Shen
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Apr 1, 1991
Inventor
Ming-Tung Shen
Assignee (at issue)
Olin 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.