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Expired European patentEurope

Use of polyaspartic acids and their salts

EP 0821054 B1 · Applicant: BAYER AG

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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 December 13, 1993 and granted April 3, 2002. A European patent lasts at most 20 years from filing, so its term ended December 13, 2013.
  • 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 13, 2019.
  • 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 13, 1993
PublishedJanuary 28, 1998
GrantedApril 3, 2002
Term endedDecember 13, 2013
Application numberEP 97118624
Classification (CPC)C09K23/16 +2 more

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedDec 13, 1993PublishedJan 28, 1998Patent grantedApril 3, 2002Term endedDec 13, 2013

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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