Patent Yard Sign in
Expired European patentEurope

Cylinder lock

EP 0835975 B1 · Applicant: Niemann, Hans-Dieter

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Filed January 13, 1995 and granted September 8, 1999. A European patent lasts at most 20 years from filing, so its term ended January 13, 2015.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by July 13, 2020.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJanuary 13, 1995
PublishedApril 15, 1998
GrantedSeptember 8, 1999
Term endedJanuary 13, 2015
Application numberEP 97121318
Classification (CPC)E05B27/0032

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedJan 13, 1995PublishedApril 15, 1998Patent grantedSep 8, 1999Term endedJan 13, 2015

Sources & verification