Granted Patent
Utility
US 4,251,579 · App. 05/910,555
Fire protection means
Inventors:
Eric Chi Shun Lee, Peter H. Lynam, Laurence J. A. Theobald, Harold W. G. Wyeth
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: May 30, 1978
Inventors
Eric Chi Shun Lee
Peter H. Lynam
Laurence J. A. Theobald
Harold W. G. Wyeth
Assignee (at issue)
Ciba-Geigy
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.