NDE Environmental Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5295391 Method and apparatus for detecting leaks in the ullage of a liquid storage tankExpiredFeb 11, 92Mar 22, 94[G01M]
5107699 Area converter for volumetric leak detectorExpiredJun 27, 89Apr 28, 92[G01M]
4805453 Tank sonic gauging system and methodsExpiredDec 24, 87Feb 21, 89[G01H, G01S, G01F]
4748846 Tank gauging system and methodsExpiredApr 14, 87Jun 07, 88[G01F]
4300388 Method for leakage measurementExpiredOct 12, 79Nov 17, 81[G01M, G01F]
4281534 Sensor for measuring leakageExpiredOct 12, 79Aug 04, 81[G01M, G01F]

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