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Expired European patentEurope

Method for the production of printing plates by means of printing irregularly distributed points

EP 0074422 B1 · Applicant: DR.-ING. RUDOLF HELL GmbH

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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.

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Why it's free to use

  • Filed September 12, 1981 and granted July 3, 1985. A European patent lasts at most 20 years from filing, so its term ended September 12, 2001.
  • 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 March 12, 2007.
  • 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.
FiledSeptember 12, 1981
PublishedMarch 23, 1983
GrantedJuly 3, 1985
Term endedSeptember 12, 2001
Application numberEP 81107207
Classification (CPC)H04N1/4051

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedSep 12, 1981PublishedMarch 23, 1983Patent grantedJuly 3, 1985Term endedSep 12, 2001

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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