EP0346844A3

Optical head apparatus

Abstract

In an optical head apparatus, a minute light beam spot is formed on a recording medium (6) by a focusing lens (5). The focusing lens focuses light radiated from a light source (1) to provide the minute light beam spot. Between the light source and the focusing lens, a light intensity or phase distribution converter (3) is provided, so that the minute light beam spot will be a super resolved light beam spot.

EP0346844A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 13 June 2009, 17.3 years ago.

1 sheet

Sheet 1

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during
EP0078580A1	Cites	European Patent Office (EPO)	Y	Search report
EP0184750A2	Cites	European Patent Office (EPO)	X	Search report
EP0195657A2	Cites	European Patent Office (EPO)	A	Search report
EP0229035A2	Cites	European Patent Office (EPO)	X	Search report
US4179708A	Cites	United States of America	X	Search report
US4546460A	Cites	United States of America	Y	Search report

21 priority claims, no other members on record

This recordMember, by publication datePriority claim

Priority claims21

Priority claims
Document	Office	Kind	Date
14724188	Japan	–	1988-06-14
14724188	Japan	A	1988-06-14
14724388	Japan	–	1988-06-14
14724388	Japan	A	1988-06-14
16402588	Japan	–	1988-06-29
16402588	Japan	A	1988-06-29
16402688	Japan	–	1988-06-29
16402688	Japan	A	1988-06-29
16402788	Japan	–	1988-06-29
16402788	Japan	A	1988-06-29
16402988	Japan	–	1988-06-29
16402988	Japan	A	1988-06-29
24506388	Japan	–	1988-09-28
24506388	Japan	A	1988-09-28
JP19880147241	–	–	–
JP19880147243	–	–	–
JP19880164025	–	–	–
JP19880164026	–	–	–
JP19880164027	–	–	–
JP19880164029	–	–	–
JP19880245063	–	–	–

23 legal events, as 2 offices reported them to INPADOC

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Events

Legal events, newest first
	Event	Code	Office
2005-04-08	Notification of lapseLapsedST	ST	FR
2005-03-01	Nl: lapsed or anulled due to non-payment of the annual feeLapsedNLV4	NLV4	EP
2005-02-28	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2005-01-01	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2005-01-01	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2003-06-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2003-06-26	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2003-06-10	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1996-09-11	No opposition filedOpposition26N	26N	EP
1996-07-26	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
1996-07-26	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
1996-01-12	Fr: translation filedET	ET	EP
1995-10-26	Corresponds to:REF	REF	EP
1995-09-20	Designated contracting statesAK	AK	EP
1995-09-20	Miscellaneous (additional remarks)TEILANMELDUNG 94120116.2 EINGEREICHT AM 13/06/89.XX	XX	EP
1995-08-04	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
1992-12-02	First examination report despatched17Q	17Q	EP
1991-11-06	Designated contracting statesAK	AK	EP
1991-09-18	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1991-07-10	Main classification (correction)RHK1	RHK1	EP
1989-12-20	Request for examination filed17P	17P	EP
1989-12-20	Designated contracting statesAK	AK	EP
1989-11-04	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Optical head apparatus

Abstract

Term

Priority claims21

Over the term

Events

Numbers

Titles3

Classification

Designated states3