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Expired European patentEurope

Chemical filter and manufacturing method thereof

EP 1820554 B1 · Applicant: Nichias Co., Ltd.

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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 24, 2001 and granted April 29, 2009. A European patent lasts at most 20 years from filing, so its term ended January 24, 2021.
  • 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 24, 2026.
  • 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 24, 2001
PublishedAugust 22, 2007
GrantedApril 29, 2009
Term endedJanuary 24, 2021
Application numberEP 07008645
Classification (CPC)B01D46/0001 +2 more

Timeline

Timeline From EPO dates

2002200420062008201020122014201620182020Application filedJan 24, 2001PublishedAug 22, 2007Patent grantedApril 29, 2009Term endedJan 24, 2021

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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