Granted Patent
Utility
US 4,239,731 · App. 06/096,489
Apparatus for biocidal sterilization using cyclic subatmospheric pressure conditioning
Inventors:
John R. Gillis, Frank E. Halleck
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Nov 21, 1979
Inventors
John R. Gillis
Frank E. Halleck
Assignee (at issue)
American Sterilizer Company
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.