Granted Patent
Utility
US 3,962,302 · App. 05/597,106
Production of isocyanates from esters of carbamic acids (urethanes)
Inventors:
Rudolph Rosenthal, John G. Zajacek
Patented Case
View Patent ↗
Granted: Jun 8, 1976
Filed: Jul 18, 1975
Inventors
Rudolph Rosenthal
John G. Zajacek
Assignee (at issue)
Atlantic Richfield 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.