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

Patent Owner(s)

Patent Owner	Address
THE H D LEE COMPANY INC	WILMINGTON DELAWARE 19810

International Classification(s)

• C09B:ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PROD....
• D06P:DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS,....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Fallah, Asadollah	Sheffield, GB	2	8
Hagerman, Caroline Elizabeth	Cambridge, GB	2	8
Hellawell, Alexander Mark	Hitchin, GB	2	8
Hoertz, Paul Gerard	Hillsborough, US	7	12
Massey, Alexander Peter Dirk	Cambridge, GB	2	8
Puvvada, Sudhakar	Cary, US	35	640
Quyoum, Ruhksana	Sheffield, GB	3	13
Rajbhandari, Rajeev	Bogart, US	4	8
Ramamoorthy, Amsarani	Greensboro, US	6	9
Scheer, Dennis	Greensboro, US	12	64

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
3.5 Year Payment	$1600.00	$800.00	$400.00	Jun 30, 2025
7.5 Year Payment	$3600.00	$1800.00	$900.00	Jun 30, 2029
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jun 30, 2033

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 3.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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

Full Text

US Patent Application No: 2021/0403,718

Modified Indigo Compounds and Methods of Dyeing a Substrate Using a Modified Indigo Compound

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