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Current content: 157 337 350 patent documents

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219 431 new documents added

1 247 852 documents amended

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EP 0202878 B1 19890201 - LIQUID-INSULATED TAP-CHANGER

Title (en)

LIQUID-INSULATED TAP-CHANGER

Publication

EP 0202878 B1 19890201 (EN)

Application

EP 86303735 A 19860516

Priority

GB 8512488 A 19850517

Abstract (en)

[origin: EP0202878A1] A liquid insulated tap-changer in which the dielectric liquid includes as a major constituent a monomeric or polymeric ester of the general formula: <CHEM> wherein R min are the same or different alkyl groups having five to ten carbon atoms, and R are independently H or Me or Et or -CH2-O-@-R min or (in the case that the ester is polymeric) <CHEM> u

IPC 1-7

H01B 3/20; H01F 29/02

IPC 8 full level

H01B 3/20 (2006.01)

CPC (source: EP)

H01B 3/20 (2013.01)

Designated contracting state (EPC)

DE FR IT NL

DOCDB simple family (publication)

EP 0202878 A1 19861126; EP 0202878 B1 19890201; DE 3662016 D1 19890309; GB 2175311 A 19861126; GB 2175311 B 19880810; GB 8512488 D0 19850619; GB 8611961 D0 19860625

DOCDB simple family (application)

EP 86303735 A 19860516; DE 3662016 T 19860516; GB 8512488 A 19850517; GB 8611961 A 19860516