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

Patent Owner(s)

Patent Owner	Address
II-VI DELAWARE INC	1100 NORTH MARKET STREET 4TH FLOOR WILMINGTON DE 19890

International Classification(s)

• G02B:OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Cohen, Mitchell S	Bedford, MA	28	774
Ma, Eugene Yi-Shan	Chestnut Hill, MA	11	119

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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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
December 04, 2007	US,7304799,B2   US7304799B2	GRANTED PATENT AS SECOND PUBLICATION
May 19, 2005	US,20050105185,A1   US20050105185A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7304799

Tunable optical filter with heater on a CTE-matched transparent substrate

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