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Expired European patentEurope

Process for the preparation of solid alkali metal salts of alpha sulfofatty acid alkyl esters

EP 0249846 B1 · Applicant: Henkel Kommanditgesellschaft auf Aktien

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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 June 6, 1987 and granted October 24, 1990. A European patent lasts at most 20 years from filing, so its term ended June 6, 2007.
  • 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 December 6, 2012.
  • 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.
FiledJune 6, 1987
PublishedDecember 23, 1987
GrantedOctober 24, 1990
Term endedJune 6, 2007
Application numberEP 87108260
Classification (CPC)C07C303/42

Timeline

Timeline From EPO dates

1988199019921994199619982000200220042006Application filedJune 6, 1987PublishedDec 23, 1987Patent grantedOct 24, 1990Term endedJune 6, 2007

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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