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

Patent Owner(s)

Patent Owner	Address
PFIZER INC	U S A

International Classification(s)

• A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
• C07D:HETEROCYCLIC COMPOUNDS
• A61P:THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDI....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Bell, Andrew Simon	Sandwich, GB	43	465
Brown, David Graham	Sandwich, GB	11	99
Dack, Kevin	Sandwich, GB	2	22
Fox, David Nathan Abraham	Sandwich, GB	18	174
Marsh, Ian Roger	Sandwich, GB	12	156
Morrell, Andrew Ian	Sandwich, GB	7	71
Palmer, Michael John	Sandwich, GB	18	261
Winslow, Carol Ann	Sandwich, GB	6	70

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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
January 17, 2012	US,8097621,B2   US8097621B2	GRANTED PATENT AS SECOND PUBLICATION
October 01, 2009	US,20090247539,A1   US20090247539A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8097621

Pyrazolo[4,3-d]pyrimidines as phosphodiesterase inhibitors

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