Granted Patent
Utility
US 4,768,568 · App. 07/070,802
Hazardous material vial apparatus providing expansible sealed and filter vented chambers
Inventors:
Donald Fournier, Douglas W. Jacobs-Perkins, William R. Tarello
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Jul 7, 1987
Inventors
Donald Fournier
Douglas W. Jacobs-Perkins
William R. Tarello
Assignee (at issue)
Survival Technology, Inc.
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.