Global Patent Index - EP 0978760 A1

EP 0978760 A1 2000-02-09 - Novel reducing agents for use in thermographic recording materials

Title (en)

Novel reducing agents for use in thermographic recording materials

Title (de)

Neue Reduktionsmittel zur Verwendung in thermographischen Aufzeichnungsmaterialien

Title (fr)

Nouveaux agents réducteurs pour l'utilisation en matériaux d'enregistrements thermographiques

Publication

EP 0978760 A1 (EN)

Application

EP 99202007 A

Priority

  • EP 99202007 A
  • EP 98202688 A

Abstract (en)

A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a thermosensitive element containing a substantially light-insensitive organic silver salt, a 1,2-dihydroxyphenyl-compound in thermal working relationship therewith and a binder, characterized in that the 1,2-dihydroxyphenyl-compound is represented by formula (I): <CHEM> where n is 0 or 1; R is -(C=O)R<1>, -(C=O)NR<1>R<2>, -CN, -SO3R<2>, -SO2R<2>, -SOR<2>, -SO2NR<2>R<3> or -PO3R<2>R<3>; R<1> is H or a substituted or unsubstituted alkyl group with 12 or less carbon atoms; and R<2> and R<3> are independently H or an alkyl, a substituted alkyl, an aryl or a substituted aryl group; and R<1> and R<2> together can provide the atoms to close a carbocyclic or heterocyclic ring; and R<2> and R<3> together can represent the atoms to close a carbocyclic or heterocyclic ring; and a recording process therefor.

IPC 1-7 (main, further and additional classification)

G03C 1/498

IPC 8 full level (invention and additional information)

G03C 1/498 (2006.01)

CPC (invention and additional information)

G03C 1/49827 (2013.01); G03C 1/4989 (2013.01); G03C 2200/45 (2013.01)

Citation (search report)

Designated contracting state (EPC)

BE DE FR GB

EPO simple patent family

EP 0978760 A1 20000209; EP 0978760 B1 20030702

INPADOC legal status


2010-06-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2010-03-26 [REG FR ST] NOTIFICATION OF LAPSE

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2010-02-24 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20090623

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2008-10-31 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2007-08-10 [REG FR TP] TRANSMISSION OF PROPERTY

2007-04-25 [REG GB 732E] AMENDMENTS TO THE REGISTER IN RESPECT OF CHANGES OF NAME OR CHANGES AFFECTING RIGHTS (SECT. 32/1977)

2004-06-23 [26N] NO OPPOSITION FILED

- Effective date: 20040405

2004-02-20 [ET] FR: TRANSLATION FILED

2003-08-07 [REF] CORRESPONDS TO:

- Document: DE 69909194 P 20030807

2003-07-02 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): BE DE FR GB

2003-07-02 [REG GB FG4D] EUROPEAN PATENT GRANTED

2003-07-02 [PG25 BE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

- Effective date: 20030702

2003-02-05 [RTI1] TITLE (CORRECTION)

- Free text: THERMOGRAPHIC RECORDING MATERIALS

2002-02-20 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: AGFA-GEVAERT

2000-10-18 [AKX] PAYMENT OF DESIGNATION FEES

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2000-10-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000809

2000-02-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE FR GB

2000-02-09 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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