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Expired European patentEurope

Surfactant composition having improved functions

EP 0303970 B1 · Applicant: ASAHI DENKA KOGYO KABUSHIKI KAISHA

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Overview

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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 August 11, 1988 and granted March 10, 1993. A European patent lasts at most 20 years from filing, so its term ended August 11, 2008.
  • 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 February 11, 2014.
  • 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.
FiledAugust 11, 1988
PublishedFebruary 22, 1989
GrantedMarch 10, 1993
Term endedAugust 11, 2008
Application numberEP 88113067
Classification (CPC)C09K23/017 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 11, 1988PublishedFeb 22, 1989Patent grantedMarch 10, 1993Term endedAug 11, 2008

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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