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Expired European patentEurope

Air partial expansion refrigeration for cryogenic air separation

EP 0338022 B1 · Applicant: ERICKSON, Donald Charles

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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 December 24, 1987 and granted November 11, 1992. A European patent lasts at most 20 years from filing, so its term ended December 24, 2007.
  • 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 24, 2013.
  • 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 24, 1987
PublishedOctober 25, 1989
GrantedNovember 11, 1992
Term endedDecember 24, 2007
Application numberEP 88901516
Classification (CPC)F25J3/04418 +2 more

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedDec 24, 1987PublishedOct 25, 1989Patent grantedNov 11, 1992Term endedDec 24, 2007

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.