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Expired European patentEurope

Mainspring device, timepiece, and method of controlling the mainspring device and the timepiece

EP 0950931 B1 · Applicant: SEIKO EPSON CORPORATION

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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 April 16, 1999 and granted October 26, 2005. A European patent lasts at most 20 years from filing, so its term ended April 16, 2019.
  • 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 October 16, 2024.
  • 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.
FiledApril 16, 1999
PublishedOctober 20, 1999
GrantedOctober 26, 2005
Term endedApril 16, 2019
Application numberEP 99302957
Classification (CPC)G04B1/22

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedApril 16, 1999PublishedOct 20, 1999Patent grantedOct 26, 2005Term endedApril 16, 2019

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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