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

Patent Owner(s)

Patent Owner	Address
NORTHERN TELECOM LTD	QUEBEC CAN

International Classification(s)

• H04K:SECRET COMMUNICATION; JAMMING OF COMMUNICATION

• 1997 Application Filing Year
• H04K Class
• 290 Applications Filed
• 195 Patents Issued To-Date
• 67.25 % Issued To-Date

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Adams, Carlisle M	Ottawa, CA	3	128
# of filed Patents : 3 Total Citations : 128
Mister, Serge J M	Amherstview, CA	1	21
# of filed Patents : 1 Total Citations : 21

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Patent Citation Ranking

• 21 Citation Count
• H04K Class

• 51.22 % this patent is cited more than
• 25 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: 6031911

Practical S box design

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Abstract

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A method of generating a substitution box (S-box) involves generating an S-box with desired characteristics, forming a new S-box with another column such that the new S-box has the desired characteristics as well, and continuing to add columns in these ways until the S-box has the proper size.

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Description

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Claims

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Claims data not available

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Legal Events

 

• STCH2008
• FP2008
• LAPS2008
• REMI2007
• FPAY2003
• I2000
• AS1998
• F1997
• AS1996
• PD1996

Date	Code	Event	Description
Mar 31, 2008	STCH	INFORMATION ON STATUS: PATENT DISCONTINUATION	free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
Feb 29, 2008	FP	LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE	Effective Date: Feb 29, 2008
Feb 29, 2008	LAPS	LAPSE FOR FAILURE TO PAY MAINTENANCE FEES
Sep 10, 2007	REMI	MAINTENANCE FEE REMINDER MAILED
Aug 28, 2003	FPAY	FEE PAYMENT	year of fee payment: 4
Feb 29, 2000	I	Issuance
Jan 07, 1998	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ADAMS, CARLISLE M.;MISTER, SERGE J.M.;REEL/FRAME:009018/0185;SIGNING DATES FROM 19971219 TO 19971223 Owner name: NORTHERN TELECOM LTD., CANADA
Jul 17, 1997	F	Filing
Dec 31, 1996	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:NORTHERN TELECOM LIMITED;REEL/FRAME:009257/0843 Owner name: ENTRUST TECHNOLOGIES LTD., CANADA Effective Date: Dec 31, 1996
Jul 18, 1996	PD	Priority Date