Granted Patent
Utility
US 4,526,766 · App. 06/560,962
Production of red phosphorus
Inventors:
Kevin Patrick Ryan, Carl D. Yank
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Dec 13, 1983
Inventors
Kevin Patrick Ryan
Carl D. Yank
Assignee (at issue)
ERCO Industries Limited
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.