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Expired European patentEurope

Diffusion vent for a rechargeable metal-air cell

EP 0708988 B1 · Applicant: AER ENERGY RESOURCES, INC.

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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 2, 1994 and granted January 28, 1998. A European patent lasts at most 20 years from filing, so its term ended June 2, 2014.
  • 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 2, 2019.
  • 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 2, 1994
PublishedMay 1, 1996
GrantedJanuary 28, 1998
Term endedJune 2, 2014
Application numberEP 94917505
Classification (CPC)H01M12/08 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJune 2, 1994PublishedMay 1, 1996Patent grantedJan 28, 1998Term endedJune 2, 2014

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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