Patents Listing John B.
Desjardins as an inventor:
US patent number 5,309,213, entitled “Optical determination of amount of soot in oil sample” Granted May 3, 1994
United
States Patent number 5,714,059 entitled “Flow unit for ferrographic
analysis” granted February 3, 1998
United
States Patent number 6,156,208, entitled “Ferrographic method” Granted
December 5, 2000
United
States Patent number 6,303,030, entitled “Ferrographic
apparatus” Granted October 16, 2001
A
related international patent, publication number WO 99/60411 entitled
“Ferographic apparatus and method” currently is pending.
The application is a compilation of US patents # 6,156,208 and 6,303,030.