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Expired European patentEurope

Procedure and means for controlling volumetric flow rate in air-conditioning installations

EP 0321515 B1 · Applicant: HALTON OY

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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 May 26, 1988 and granted August 4, 1993. A European patent lasts at most 20 years from filing, so its term ended May 26, 2008.
  • 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 November 26, 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.
FiledMay 26, 1988
PublishedJune 28, 1989
GrantedAugust 4, 1993
Term endedMay 26, 2008
Application numberEP 88904971
Classification (CPC)F24F11/74 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedMay 26, 1988PublishedJune 28, 1989Patent grantedAug 4, 1993Term endedMay 26, 2008

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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