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Expired European patentEurope

System for automatically positioning a wafer within the focal plane of an optical system

EP 0039407 B1 · Applicant: THE PERKIN-ELMER 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 March 26, 1981 and granted November 27, 1985. A European patent lasts at most 20 years from filing, so its term ended March 26, 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 September 26, 2006.
  • 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.
FiledMarch 26, 1981
PublishedNovember 11, 1981
GrantedNovember 27, 1985
Term endedMarch 26, 2001
Application numberEP 81102301
Classification (CPC)G03F9/7026

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedMarch 26, 1981PublishedNov 11, 1981Patent grantedNov 27, 1985Term endedMarch 26, 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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