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Expired European patentEurope

High selectivity process for vapor phase oxydehydrogenation of alkanoic acids, such as isobutyric acid, using Dawson structure phosphomolybdic acid

EP 0063956 B1 · Applicant: ATLANTIC RICHFIELD COMPANY

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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 April 27, 1982 and granted June 12, 1985. A European patent lasts at most 20 years from filing, so its term ended April 27, 2002.
  • 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 October 27, 2007.
  • 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.
FiledApril 27, 1982
PublishedNovember 3, 1982
GrantedJune 12, 1985
Term endedApril 27, 2002
Application numberEP 82302162
Classification (CPC)C07C51/377 +1 more

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedApril 27, 1982PublishedNov 3, 1982Patent grantedJune 12, 1985Term endedApril 27, 2002

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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