Granted Patent
Utility
US 4,246,339 · App. 05/956,702
Test device
Inventors:
Francis X. Cole, James H. Edwards, Clifford L. Hendrick, Deborah M. VanVoorhis
Patented Case
View Patent ↗
Granted: Jan 20, 1981
Filed: Nov 1, 1978
Inventors
Francis X. Cole
James H. Edwards
Clifford L. Hendrick
Deborah M. VanVoorhis
Assignee (at issue)
Millipore 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.