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

Patent Owner(s)

Patent Owner	Address
SYNTEX (U S A ) INC	PALO ALTO CA

International Classification(s)

• C07C:ACYCLIC OR CARBOCYCLIC COMPOUNDS

• 1992 Application Filing Year
• C07C Class
• 1958 Applications Filed
• 736 Patents Issued To-Date
• 37.59 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Arzeno, Humberto B	Cupertino, CA	9	35
# of filed Patents : 9 Total Citations : 35
Morgans, Jr David J	Sunnyvale, CA	21	301
# of filed Patents : 21 Total Citations : 301

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Patent Citation Ranking

• 0 Citation Count
• C07C Class

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

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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

Full Text

US Patent No: 5948939

Selective amidination of diamines

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Abstract

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An .omega.-guanidino-.alpha.-amino-acid (or its functional derivative) or a compound containing it may be prepared by the reaction of the .omega.-amino group of an .alpha.,.omega.-diamino acid (or its functional derivative) or a compound containing it with a formamidinesulfonic acid.

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Description

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Claims

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Legal Events

 

• STCH2003
• LAPS2003
• FP2003
• REMI2003
• I1999
• F1992
• PD1986

Date	Code	Event	Description
Oct 08, 2003	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Sep 08, 2003	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Sep 07, 2003	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Sep 07, 2003
Mar 26, 2003	REMI	MAINTENANCE FEE REMINDER MAILED
Sep 07, 1999	I	Issuance
Apr 20, 1992	F	Filing
Sep 10, 1986	PD	Priority Date