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Method of recovering heat from intermediate absorption in the production of sulfuric acid by double conversion together with production of oleum

EP 0154238 A2 · Applicant: BAYER ANTWERPEN N.V.

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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 February 16, 1985 and never granted as a European patent. Had it been granted, its 20-year term would have ended February 16, 2005.
  • 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 August 16, 2010.
  • 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.
FiledFebruary 16, 1985
PublishedSeptember 11, 1985
GrantedNever granted
Term endedFebruary 16, 2005
Application numberEP 85101730
Classification (CPC)C01B17/76

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedFeb 16, 1985PublishedSep 11, 1985Term endedFeb 16, 2005

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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