Granted Patent
Utility
US 4,302,611 · App. 06/187,691
Preparation of acetaldehyde
Inventor:
Richard V. Porcelli
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Sep 16, 1980
Inventor
Richard V. Porcelli
Assignee (at issue)
Halcon Research and Development Corp.
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.