EP0241013A3

Apparatus for detecting surface microdefects in a metal workpiece

Abstract

The apparatus (1) comprises an induced current sensor (3) formed from at least two cores (5, 6) of ferromagnetic material, on each of which at least one conducting winding (7, 8) is provided. Said cores (5, 6) have adjacent terminal portions (9, 10) which are conveniently separated by an air gap (a) of the order of a few tens of µm and which, when in use, are made to traverse the surface of the workpiece (2) in which any microdefects are to be detected.

EP0241013A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 8 April 2007, 19.5 years ago.

1 sheet

Sheet 1

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Citations
Document	Relation	Office	Category	Cited during
FR2261526A1	Cites	France	Y	Search report
US2351944A	Cites	United States of America	Y	Search report
US3611120A	Cites	United States of America	A	Search report
US3753096A	Cites	United States of America	A	Search report
US3840802A	Cites	United States of America	A	Search report
US4134067A	Cites	United States of America	Y	Search report

5 priority claims, no other members on record

This recordMember, by publication datePriority claim

Priority claims5

Priority claims
Document	Office	Kind	Date
6729686	Italy	A	1986-04-11
6729686	Italy	A	1986-04-11
6729686	Italy	–	1986-04-11
6729686	–	–	–
IT19860067296	–	–	–

22 legal events, as 2 offices reported them to INPADOC

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	Event	Code	Office
1998-02-27	Notification of lapseLapsedST	ST	FR
1998-01-01	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1997-12-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1996-06-14	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1996-03-28	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1995-12-06	Gb: european patent ceased through non-payment of renewal feeCeasedGBPC	GBPC	EP
1995-07-12	No opposition filedOpposition26N	26N	EP
1995-05-25	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
1995-05-25	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
1995-04-08	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-11-04	Fr: translation filedET	ET	EP
1994-10-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-10-20	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-08-25	Corresponds to:REF	REF	EP
1994-07-20	Designated contracting statesAK	AK	EP
1994-06-03	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
1992-02-05	First examination report despatched17Q	17Q	EP
1990-09-12	Request for examination filed17P	17P	EP
1990-03-07	Designated contracting statesAK	AK	EP
1990-01-17	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1987-10-14	Designated contracting statesAK	AK	EP
1987-08-31	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Apparatus for detecting surface microdefects in a metal workpiece

Abstract

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