Granted Patent
Utility
US 4,554,294 · App. 06/678,311
Nitro urea based blowing agents
Inventors:
Byron A. Hunter, Donald G. Rowland, Warren J. Peascoe
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Dec 5, 1984
Inventors
Byron A. Hunter
Donald G. Rowland
Warren J. Peascoe
Assignee (at issue)
Uniroyal Ltd.
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.