Granted Patent
Utility
US 4,356,166 · App. 05/967,605
Time-release chemical delivery system
Inventors:
Robert Peterson, James M. Anderson, Donald E. Gregonis, Sunj-Wan Kim, Jan Feijen
Patented Case
View Patent ↗
Granted: Oct 26, 1982
Filed: Dec 8, 1978
Inventors
Robert Peterson
James M. Anderson
Donald E. Gregonis
Sunj-Wan Kim
Jan Feijen
Assignee (at issue)
THE UNIVERSITY OF UTAH
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.