Granted Patent
Utility
US 3,979,666 · App. 05/511,008
Method and apparatus for evaluating properties of carbon fibers using capacitance sensing
Inventors:
Alexander MacLean, Ilmar L. Kalniv
Patented Case
View Patent ↗
Granted: Sep 7, 1976
Filed: Oct 1, 1974
Inventors
Alexander MacLean
Ilmar L. Kalniv
Assignee (at issue)
Celanese GmbH
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.