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Expired European patentEurope

Light barrier

EP 0298237 B1 · Applicant: Deutsche Aerospace AG

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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 May 25, 1988 and granted January 26, 1994. A European patent lasts at most 20 years from filing, so its term ended May 25, 2008.
  • 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 November 25, 2013.
  • 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.
FiledMay 25, 1988
PublishedJanuary 11, 1989
GrantedJanuary 26, 1994
Term endedMay 25, 2008
Application numberEP 88108285
Classification (CPC)H01S5/10 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMay 25, 1988PublishedJan 11, 1989Patent grantedJan 26, 1994Term endedMay 25, 2008

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