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

Patent Owner(s)

Patent Owner	Address
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION	SEOUL
NANOBRICK CO LTD	68 SANDAN-RO 52BEON-GIL PYEONGTAEK-SI GYEONGGI-DO 17746 17746

International Classification(s)

• B82Y:SPECIFIC USES OR APPLICATIONS OF NANO-STRUCTURES; ....
• C04B:LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREO....
• B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
• B22F:WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES F....
• H01F:MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF M....

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Cha, Jin Myung	Seoul, KR	3	2
# of filed Patents : 3 Total Citations : 2
Lee, Jin Kyu	Seoul, KR	164	1972
# of filed Patents : 164 Total Citations : 1972

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• B82Y Class

• 0 % this patent is cited more than
• 11 Age

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Mar 23, 2026

Fee	Large entity fee	small entity fee	micro entity fee
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
September 23, 2014	US,8840801,B2   US8840801B2	GRANTED PATENT AS SECOND PUBLICATION
April 25, 2013	US,20130099152,A1   US20130099152A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7055470

Internal combustion engines having double cylinder units

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Abstract

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An internal combustion engine may comprise at least one double cylinder (17). A piston (10, 12) is reciprocally movably disposed in each individual cylinder (14, 16) of the double cylinder and each piston is connected to a crankshaft (4). The pistons preferably reciprocate in the same direction within the individual cylinders. A cylinder space (19, 20) is defined within the cylinders above each piston head. Preferably, the cylinder spaces are formed such that the cylinder spaces communicate during at least a portion of the reciprocal movement of the pistons.

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Description

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Claims

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Legal Events

 

• STCH2010
• FP2010
• LAPS2010
• REMI2010
• I2006
• P2004
• AS2004
• F2004
• PD2003

Date	Code	Event	Description
Jul 05, 2010	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Jun 06, 2010	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Jun 06, 2010
Jun 06, 2010	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Jan 11, 2010	REMI	MAINTENANCE FEE REMINDER MAILED
Jun 06, 2006	I	Issuance
Nov 18, 2004	P	Published
Jun 07, 2004	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KREUTER, PETER;VON ESSEN, MATHIAS;REEL/FRAME:015580/0108 Owner name: META MOTOREN- UND ENERGIE-TECHNIK GMBH, GERMANY Effective Date: Jun 07, 2004
Mar 12, 2004	F	Filing
Mar 14, 2003	PD	Priority Date