IP Library Granted Patent US 3,979,666
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 3,979,666
App. No.
05/511,008
Filed
1974-10-01
Granted
1976-09-07
Kind
A