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Expired European patentEurope

Control system for dental chair adjustable by a motor

EP 0000735 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 July 26, 1978 and granted March 18, 1981. A European patent lasts at most 20 years from filing, so its term ended July 26, 1998.
  • 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 January 26, 2004.
  • 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.
FiledJuly 26, 1978
PublishedFebruary 21, 1979
GrantedMarch 18, 1981
Term endedJuly 26, 1998
Application numberEP 78100514
Classification (CPC)A61G15/02 +1 more

Timeline

Timeline From EPO dates

1979198119831985198719891991199319951997Application filedJuly 26, 1978PublishedFeb 21, 1979Patent grantedMarch 18, 1981Term endedJuly 26, 1998

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.