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Expired European patentEurope

The use of polyacetals based on vinylethers and dihydroxy compounds in detergent compositions

EP 0548639 B1 · Applicant: BASF Aktiengesellschaft

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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 December 5, 1992 and granted June 10, 1998. A European patent lasts at most 20 years from filing, so its term ended December 5, 2012.
  • 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 June 5, 2018.
  • 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.
FiledDecember 5, 1992
PublishedJune 30, 1993
GrantedJune 10, 1998
Term endedDecember 5, 2012
Application numberEP 92120782
Classification (CPC)C08G65/34 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedDec 5, 1992PublishedJune 30, 1993Patent grantedJune 10, 1998Term endedDec 5, 2012

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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