Granted Patent
Utility
US 4,353,249 · App. 06/202,076
Method and apparatus for in situ determination of permeability and porosity
Inventors:
Peter L. Lagus, Edward W. Peterson
Patented Case
View Patent ↗
Granted: Oct 12, 1982
Filed: Oct 30, 1980
Inventors
Peter L. Lagus
Edward W. Peterson
Assignee (at issue)
Systems, Science and Software
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.