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Expired European patentEurope

Process for grinding curved surfaces of non metallic solid rotary bodies, in particular glass bodies, and device for carrying out the process

EP 0013404 B1 · Applicant: Schott-Zwiesel-Glaswerke Aktiengesellschaft

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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 December 21, 1979 and granted July 27, 1983. A European patent lasts at most 20 years from filing, so its term ended December 21, 1999.
  • 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 June 21, 2005.
  • 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.
FiledDecember 21, 1979
PublishedJuly 23, 1980
GrantedJuly 27, 1983
Term endedDecember 21, 1999
Application numberEP 79105310
Classification (CPC)B24B19/006

Timeline

Timeline From EPO dates

1980198219841986198819901992199419961998Application filedDec 21, 1979PublishedJuly 23, 1980Patent grantedJuly 27, 1983Term endedDec 21, 1999

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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