Global Patent Index - EP 0962691 A3

EP 0962691 A3 2000-10-25 - Yttrium oxide based gas mantle

Title (en)

Yttrium oxide based gas mantle

Title (de)

Yttriumoxid enthaltender Gasglühkörper

Title (fr)

Manchon pour lampe à gaz contenant de l'oxyde d'yttrium

Publication

EP 0962691 A3 (EN)

Application

EP 99304169 A

Priority

GB 9812110 A

Abstract (en)

[origin: EP0962691A2] The present invention relates to incandescent pre-formed low-pressure gas mantles useful for fixed fuel-burning lanterns, such as stationary lamp posts or patio lights (typically at gas pressures of 2.7KPa). The pre-formed low-pressure gas mantle has a body comprising: (A) 77.1 to 85.3 mol% yttrium oxide as the predominant metal oxide, (B) 1.4 to 3.1 mol% of at least one lanthanide oxide, (C) 2.2 to 5.0 mol% of at least one of magnesium oxide and aluminium oxide, and (D) 11.1 to 14.8 mol% of calcium oxide, based on the total molar content of (A), (B), (C) and (D). Such a mantle is non-radioactive, durable and provides good illumination.

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

F21H 1/02

IPC 8 full level (invention and additional information)

F21H 1/02 (2006.01)

CPC (invention and additional information)

F21H 1/02 (2013.01)

Citation (search report)

[DA] GB 2145811 A 19850403 - COLEMAN CO

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0962691 A2 19991208; EP 0962691 A3 20001025; EP 0962691 B1 20030514; DE 69907806 D1 20030618; DE 69907806 T2 20040122; GB 9812110 D0 19980805

INPADOC legal status


2009-04-30 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20081202

2007-05-24 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20070524

- Year of fee payment: 9

2004-05-06 [26N] NO OPPOSITION FILED

- Effective date: 20040217

2003-06-18 [REF] CORRESPONDS TO:

- Document: DE 69907806 P 20030618

2003-05-14 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): DE

2001-07-18 [AKX] PAYMENT OF DESIGNATION FEES

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2001-01-24 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001201

2000-10-25 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-10-25 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

1999-12-08 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE

1999-12-08 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI