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Expired European patentEurope

Resinlike salts, their preparation and their use in coatings

EP 0051561 B1 · Applicant: CIBA-GEIGY AG

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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 October 19, 1981 and granted October 31, 1984. A European patent lasts at most 20 years from filing, so its term ended October 19, 2001.
  • 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 April 19, 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.
FiledOctober 19, 1981
PublishedMay 12, 1982
GrantedOctober 31, 1984
Term endedOctober 19, 2001
Application numberEP 81810418
Classification (CPC)C09D5/4419

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedOct 19, 1981PublishedMay 12, 1982Patent grantedOct 31, 1984Term endedOct 19, 2001

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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