Global Patent Index - EP 0460309 B2

EP 0460309 B2 2000-07-05 - Modified dispersant compositions

Title (en)

Modified dispersant compositions

Title (de)

Modifizierte Lösungsmittelzusammensetzungen

Title (fr)

Compositions dispersantes modifiées

Publication

EP 0460309 B2 (EN)

Application

EP 90306128 A

Priority

EP 90306128 A

Abstract (en)

[origin: EP0460309A1] An oil soluble dispersant composition formed by reacting a basic nitrogen-containing ashless dispersant (i) with at least one dibasic acylating agent and (ii) with at least one boron compound, said reactions (i) and (ii) being conducted concurrently or sequentially in any order such that the initial ashless dispersant is chemically modified via acylation in (i) and by boronation in (ii).

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

C10M 133/56

IPC 8 full level (invention and additional information)

C10M 159/12 (2006.01); C10L 1/2383 (2006.01); C10M 125/26 (2006.01); C10M 129/34 (2006.01); C10M 129/36 (2006.01); C10M 133/16 (2006.01); C10M 133/52 (2006.01); C10M 133/56 (2006.01); C10M 133/58 (2006.01); C10M 139/00 (2006.01); C10M 159/16 (2006.01); C10N 30/04 (2006.01); C10N 60/14 (2006.01); C10N 70/00 (2006.01)

CPC (invention and additional information)

C10L 1/2383 (2013.01); C10M 133/52 (2013.01); C10M 133/56 (2013.01); C10M 159/16 (2013.01)

Citation (opposition)

Opponent :

Designated contracting state (EPC)

BE DE ES FR GB IT NL SE

EPO simple patent family

EP 0460309 A1 19911211; EP 0460309 B1 19950823; EP 0460309 B2 20000705; AU 645809 B2 19940127; AU 7813491 A 19911212; CA 2043998 A1 19911207; CA 2043998 C 20030812; DE 69021872 D1 19950928; DE 69021872 T2 19960118; DE 69021872 T3 20030213; JP 2966586 B2 19991025; JP H04227995 A 19920818; ZA 9104157 B 19930224

INPADOC legal status


2008-05-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2008-02-27 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

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2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-12-31 [BERE] BE: LAPSED

- Owner name: ETHYL PETROLEUM ADDITIVES LTD

- Effective date: 20010630

2001-06-30 [PG25 BE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2001-03-15 [REG DE 8570] REINSTATEMENT OF THE FORMER POSITION

2000-09-22 [ET3] FR: TRANSLATION FILED ** DECISION CONCERNING OPPOSITION

2000-07-05 [27A] MAINTAINED AS AMENDED

- Effective date: 20000705

2000-07-05 [AK] DESIGNATED CONTRACTING STATES:

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1996-07-10 [26] OPPOSITION FILED

- Opponent name: EXXON CHEMICAL PATENTS INC.

- Effective date: 19960517

1996-02-01 [NLV1] NL: LAPSED OR ANNULLED DUE TO FAILURE TO FULFILL THE REQUIREMENTS OF ART. 29P AND 29M OF THE PATENTS ACT

1995-11-23 [PG25 SE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Effective date: 19951123

1995-10-06 [ET] FR: TRANSLATION FILED

1995-09-28 [REF] CORRESPONDS TO:

- Document: DE 69021872 19950928

1995-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): BE DE ES FR GB IT NL SE

1995-08-23 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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1995-08-23 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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1995-08-23 [PG25 NL] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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1992-06-17 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19920504

1992-01-08 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19911115

1991-12-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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