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Expired European patentEurope

Print engine drive interface

EP 0321491 B1 · Applicant: DIGITAL EQUIPMENT CORPORATION

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Overview

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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 August 25, 1987 and granted June 16, 1993. A European patent lasts at most 20 years from filing, so its term ended August 25, 2007.
  • 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 February 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.
FiledAugust 25, 1987
PublishedJune 28, 1989
GrantedJune 16, 1993
Term endedAugust 25, 2007
Application numberEP 87905879
Classification (CPC)G06K15/00

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedAug 25, 1987PublishedJune 28, 1989Patent grantedJune 16, 1993Term endedAug 25, 2007

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.