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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
BT INDUSTRIES AB	59581 MJÖLBY

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Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Gustaffson, Tore	Mjolby, SE	1	14
# of filed Patents : 1 Total Citations : 14
Munde, Jan	Linkoping, SE	2	19
# of filed Patents : 2 Total Citations : 19

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent No: 7225671

Fluid-quantity gauging

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Abstract

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An ultrasonic fuel-gauging system has several probes each having a transducer mounted at the lower end of a still well. The transducers are connected to a processor, which measures the height of fuel above the transducers within the still wells. The processor also measures the resonant frequency of each transducer and from this calculates fuel density. The system calculates the mass of fuel in the tank from the density and the volume as calculated from the heights.

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Description

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