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

Patent Owner(s)

Patent Owner	Address
SHARP KABUSHIKI KAISHA	1 TAKUMI-CHO SAKAI-KU SAKAI CITY OSAKA 590-8522

International Classification(s)

• H01J:ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Adachi, Katsumi	Sakai, JP	184	2614
# of filed Patents : 184 Total Citations : 2614
Hirakawa, Hiroyuki	Sakai, JP	49	348
# of filed Patents : 49 Total Citations : 348
Iwamatsu, Tadashi	Sakai, JP	78	601
# of filed Patents : 78 Total Citations : 601

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
7.5 Year Payment	$3600.00	$1800.00	$900.00	Jan 28, 2028
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jan 28, 2032

Fee	Large entity fee	small entity fee	micro entity fee
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

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
July 28, 2020	US,10727021,B2   US10727021B2	GRANTED PATENT AS SECOND PUBLICATION
May 23, 2019	US,20190157033,A1   US20190157033A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent Application No: 10727021

Electron emission element, electrification apparatus, and image forming apparatus

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Abstract

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An electron emission element (20) includes a first electrode (30a) and a second electrode (40) which are arranged facing each other, an intermediate layer (50) that is provided between the first electrode (30a) and the second electrode (40), and an insulating layer (60) that is formed with a thickness d1 on a substrate (30). A level difference between the insulating layer (60) and the first electrode (30a) is smaller than the thickness d1 of the insulating layer (60).

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Description

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Claims

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• F2017
• PD2016

Date	Code	Event	Description
Dec 08, 2023	MAFP	MAINTENANCE FEE PAYMENT	free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY year of fee payment: 4
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May 23, 2019	P	Published
Jan 07, 2019	AS	ASSIGNMENT	free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ADACHI, KATSUMI;HIRAKAWA, HIROYUKI;IWAMATSU, TADASHI;SIGNING DATES FROM 20181122 TO 20181126;REEL/FRAME:047923/0079 Owner name: SHARP KABUSHIKI KAISHA, JAPAN
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Jul 14, 2017	F	Filing
Jul 21, 2016	PD	Priority Date