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Expired European patentEurope

An improved refrigeration circuit and method of de-frosting it

EP 0477475 B1 · Applicant: COSTAN S.P.A.

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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 20, 1991 and granted December 21, 1994. A European patent lasts at most 20 years from filing, so its term ended June 20, 2011.
  • 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 20, 2016.
  • 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 20, 1991
PublishedApril 1, 1992
GrantedDecember 21, 1994
Term endedJune 20, 2011
Application numberEP 91110116
Classification (CPC)F25B5/04 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedJune 20, 1991PublishedApril 1, 1992Patent grantedDec 21, 1994Term endedJune 20, 2011

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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