Granted Patent
Utility
US 4,289,728 · App. 06/109,317
Improvements in methods of sterilization
Inventors:
John L. Peel, William M. Waites
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jan 3, 1980
Inventors
John L. Peel
William M. Waites
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.