Granted Patent
Utility
US 5,156,887 · App. 07/657,661
Method for injecting a chemical barrier into a surface aperture
Inventors:
Mark Kevin Addison, William F. Campbell, Ralph J. Panno
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Feb 19, 1991
Inventors
Mark Kevin Addison
William F. Campbell
Ralph J. Panno
Assignee (at issue)
General Dynamics 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.