Granted Patent
Utility
US 4,234,519 · App. 06/006,824
Recovery of methacrolein
Inventors:
Neil Yeoman, Sidney S. Stern
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Jan 26, 1979
Inventors
Neil Yeoman
Sidney S. Stern
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.