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Expired European patentEurope

Cryogenic rectification method and apparatus

EP 0697575 B1 · Applicant: THE BOC GROUP, INC.

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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 August 10, 1995 and granted June 3, 1998. A European patent lasts at most 20 years from filing, so its term ended August 10, 2015.
  • 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 February 10, 2021.
  • 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.
FiledAugust 10, 1995
PublishedFebruary 21, 1996
GrantedJune 3, 1998
Term endedAugust 10, 2015
Application numberEP 95305579
Classification (CPC)F25J3/04412 +2 more

Timeline

Timeline From EPO dates

1996199820002002200420062008201020122014Application filedAug 10, 1995PublishedFeb 21, 1996Patent grantedJune 3, 1998Term endedAug 10, 2015

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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