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Expired European patentEurope

Method of recovering alkaline chemicals from flue gases containing alkaline metal vapor

EP 0261116 B1 · Applicant: A. AHLSTROM CORPORATION

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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 16, 1986 and granted March 28, 1990. A European patent lasts at most 20 years from filing, so its term ended May 16, 2006.
  • 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 16, 2011.
  • 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 16, 1986
PublishedMarch 30, 1988
GrantedMarch 28, 1990
Term endedMay 16, 2006
Application numberEP 86903387
Classification (CPC)B01D7/00 +2 more

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMay 16, 1986PublishedMarch 30, 1988Patent grantedMarch 28, 1990Term endedMay 16, 2006

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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