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Expired European patentEurope

Installation and process for the periodical charging and discharging of a gas-storage device

EP 0331627 B1 · Applicant: GEBRÜDER SULZER 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 January 16, 1989 and granted November 21, 1991. A European patent lasts at most 20 years from filing, so its term ended January 16, 2009.
  • 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 July 16, 2014.
  • 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.
FiledJanuary 16, 1989
PublishedSeptember 6, 1989
GrantedNovember 21, 1991
Term endedJanuary 16, 2009
Application numberEP 89810035
Classification (CPC)F17C5/06

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJan 16, 1989PublishedSep 6, 1989Patent grantedNov 21, 1991Term endedJan 16, 2009

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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