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European application, no grantEurope

Improved seals comprising a film of substituted organosilane for alkaline electrochemical cells

EP 0042802 A2 · Applicant: UNION CARBIDE 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 June 23, 1981 and never granted as a European patent. Had it been granted, its 20-year term would have ended June 23, 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 December 23, 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.
FiledJune 23, 1981
PublishedDecember 30, 1981
GrantedNever granted
Term endedJune 23, 2001
Application numberEP 81401011
Classification (CPC)H01M50/193

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedJune 23, 1981PublishedDec 30, 1981Term endedJune 23, 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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