GPI coverage and content

You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 157 337 350 patent documents

This week's update (19/07/2024 12:00 CET):

219 431 new documents added

1 247 852 documents amended

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EP 0143956 B1 19880504 - PRESSURE EXCHANGER

Title (en)

PRESSURE EXCHANGER

Publication

EP 0143956 B1 19880504 (DE)

Application

EP 84112407 A 19841015

Priority

CH 640283 A 19831130

Abstract (en)

[origin: US4744213A] A pressure-wave machine for supercharging internal combustion engines having a cellular wheel with surfaces coated with catalyst material.

IPC 1-7

F02B 33/42; F04F 11/02; F01N 3/28

IPC 8 full level

F01N 3/28 (2006.01); F02B 33/42 (2006.01); F04F 13/00 (2009.01)

IPC 8 main group level

F04F 99/00 (2009.01)

CPC (source: EP US)

F01N 3/28 (2013.01 - EP US); F02B 33/42 (2013.01 - EP US); F04F 13/00 (2013.01 - EP US); F01N 2510/06 (2013.01 - EP US); F02G 2254/11 (2013.01 - EP US)

Designated contracting state (EPC)

CH DE GB IT LI

DOCDB simple family (publication)

EP 0143956 A1 19850612; EP 0143956 B1 19880504; DE 3470904 D1 19880609; JP S60135615 A 19850719; US 4744213 A 19880517

DOCDB simple family (application)

EP 84112407 A 19841015; DE 3470904 T 19841015; JP 25209884 A 19841130; US 90197886 A 19860902