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: 157 117 910 patent documents

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

139 301 new documents added

1 340 825 documents amended

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EP 0276252 B1 19900103 - SCREW ROTOR COMPRESSOR

Title (en)

SCREW ROTOR COMPRESSOR

Publication

EP 0276252 B1 19900103 (EN)

Application

EP 87904634 A 19870626

Priority

GB 8616596 A 19860708

Abstract (en)

[origin: WO8800294A1] A screw compressor drivingly connected to a prime mover with variable speed provided with an inlet port having a section acting as a by-pass at low rotor speeds only.

IPC 1-7

F04C 18/16

IPC 8 full level

F04C 18/16 (2006.01); F04C 28/08 (2006.01); F04C 28/18 (2006.01); F04C 29/12 (2006.01)

CPC (source: EP)

F04C 18/16 (2013.01); F04C 28/08 (2013.01); F04C 28/18 (2013.01); F04C 29/12 (2013.01)

Citation (examination)

US 4435139 A 19840306 - ASTBERG AKE [SE]

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI NL SE

DOCDB simple family (publication)

WO 8800294 A1 19880114; EP 0276252 A1 19880803; EP 0276252 B1 19900103; GB 8616596 D0 19860813

DOCDB simple family (application)

SE 8700305 W 19870626; EP 87904634 A 19870626; GB 8616596 A 19860708