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

Patent Owner(s)

Patent Owner	Address
NORTHROP GRUMMAN SYSTEMS CORPORATION	2980 FAIRVIEW PARK DRIVE FALLS CHURCH VA 22042-4511

International Classification(s)

• F02K:JET-PROPULSION PLANTS
• F02C:GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION....
• F23R:GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Gettinger, Christopher D	Palm Beach Gardens, US	2	2
Guinan, Daniel P	Hobe Sound, US	10	81

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
7.5 Year Payment	$3600.00	$1800.00	$900.00	Feb 8, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Feb 8, 2029

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 7.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
August 08, 2017	US,9726080,B2   US9726080B2	GRANTED PATENT AS SECOND PUBLICATION
October 10, 2013	US,20130263569,A1   US20130263569A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9726080

Helical cross flow (HCF) pulse detonation engine

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