EP0444579A3

Ink jet recording apparatus

Abstract

An ink jet recording apparatus records information by ejecting ink droplets onto a recording medium (63). The ink jet recording apparatus has a recording head (101H); driving circuits (51), measuring circuit (53), and a judging unit (50). The recording head (101H) has ejection outlets (5) and ink liquid passages (4) connecting to the ejection outlets (5) respectively, an electro-thermal converting element (7) being disposed in each of the ink liquid passages (4), for generating thermal energy for ejecting the ink droplets. The driving circuits (51) drive the electro-thermal converting element (7) to generate the thermal energy enough to eject the ink droplet. The measuring circuit (53) individually measures a resistance value of the electro-thermal converting element (7) when the driving circuits (51) drive the electro-thermal converting element (7). The judging unit (50) judges presence of an abnormal state in the ink liquid passage (4) according to the resistance value.

EP0444579A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 25 February 2011, 15.6 years ago.

1 sheet

Sheet 1

Every citation, both waysCites: the store holds 5 of 6

Citations
Document	Relation	Office	Category	Cited during
GB2210586A	Cites	United Kingdom	A	Search report
US4558332A	Cites	United States of America	A	Search report
US4577203A	Cites	United States of America	A	Search report
US4625220A	Cites	United States of America	A	Search report
US4813802A	Cites	United States of America	A	Search report
PATENT ABSTRACTS OF JAPAN vol. 8, no. 104 (M-296)(1541) May 16, 1984; & JP-A-59 14 967 (MIYAGAWA ) January 25, 1984	Non-patent	–	–	Search report
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 24, no. 3, August 1981, NEW YORK US page 1585; IKOMA: 'Method to detect "in situ" defects in nozzles in ink jet printers '	Non-patent	–	–	Search report
PATENT ABSTRACTS OF JAPAN vol. 4, no. 146 (P-31)October 15, 1980; & JP-A-55 095 184 (SHINJI ) July 19, 1980	Non-patent	–	–	Search report
PATENT ABSTRACTS OF JAPAN vol. 4, no. 116 (M-27)(598) August 19, 1980; & JP-A-55 74 890 (KIYAMA ) June 5, 1980	Non-patent	–	–	Search report
PATENT ABSTRACTS OF JAPAN vol. 6, no. 224 (M-170)(1102) November 9, 1982; & JP-A-57 128 558 (TERASAWA ) August 10, 1982	Non-patent	–	–	Search report
PATENT ABSTRACTS OF JAPAN vol. 13, no. 360 (M-858)(3708) August 11, 1989; & JP-A-1 120 351 (TAZAKI ) May 12, 1989	Non-patent	–	–	Search report

11 members in 5 offices

This recordMember, by publication datePriority claim

Priority claims12

Priority claims
Document	Office	Kind	Date
4253190	Japan	–	1990-02-26
4253190	Japan	A	1990-02-26
4253190	Japan	A	1990-02-26
4253290	Japan	–	1990-02-26
4253290	Japan	A	1990-02-26
4253290	Japan	A	1990-02-26
3011491	Japan	–	1991-02-25
3011491	Japan	A	1991-02-25
3011491	Japan	A	1991-02-25
JP19900042531	–	–	–
JP19900042532	–	–	–
JP19910030114	–	–	–

Members11

Family members, oldest first
Document	Office	Kind
EP0444579A2	European Patent Office (EPO)	A2	1991-09-04
JPH03246056A	Japan	A	1991-11-01
EP0444579A3This record	European Patent Office (EPO)	A3	1991-12-27
JPH04211961A	Japan	A	1992-08-03
US5182580A	United States of America	A	1993-01-26
US5319389A	United States of America	A	1994-06-07
JP2690799B2	Japan	B2	1997-12-17
EP0444579B1	European Patent Office (EPO)	B1	1999-06-23
AT181531T	Austria	T	1999-07-15
DE69131362D1	Germany	D1	1999-07-29
DE69131362T2	Germany	T2	2000-03-23

45 legal events, as 5 offices reported them to INPADOC

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Events

Legal events, newest first
	Event	Code	Office
2013-06-28	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2011-07-29	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2011-03-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2011-03-16	Patent expired after termination of 20 yearsExpiredPE20	PE20	GB
2011-02-25	Expiry of rightR071	R071	DE
2011-01-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2010-11-19	Notification of lapseLapsedST	ST	FR
2010-06-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2010-06-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2009-10-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2009-08-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2002-01-01	European patent in force as of 2002-01-01IF02	IF02	GB
2000-06-14	No opposition filedOpposition26N	26N	EP
2000-04-28	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2000-04-28	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2000-02-25	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-12-31	Patent ceasedCeasedPL	PL	CH
1999-12-01	Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents actLapsedNLV1	NLV1	EP
1999-10-22	Fr: translation filedET	ET	EP
1999-09-23	It: translation for a ep patent filedITF	ITF	EP
1999-09-23	It: translation for a ep patent filedITF	ITF	EP
1999-09-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-07-29	Corresponds to:REF	REF	EP
1999-06-30	European patent takes effect as a national patent in ch/liEP	EP	CH
1999-06-23	Designated contracting statesAK	AK	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1999-06-23	Corresponds to:REF	REF	EP
1999-05-07	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
1999-03-26	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH	GRAH	EP
1998-12-14	Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG	GRAG	EP
1998-12-14	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH	GRAH	EP
1998-05-28	Despatch of communication of intention to grantORIGINAL CODE: EPIDOS AGRAGRAG	GRAG	EP
1993-10-20	First examination report despatched17Q	17Q	EP
1991-12-27	Designated contracting statesAK	AK	EP
1991-11-06	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1991-09-04	Request for examination filed17P	17P	EP
1991-09-04	Designated contracting statesAK	AK	EP
1991-07-18	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Ink jet recording apparatus

Abstract

Term

Priority claims12

Members11

Over the term

Events

Numbers

Titles3

Classification

Designated states1