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Expired European patentEurope

A surface treating agent and the process therefor

EP 0249975 B1 · Applicant: NIPPON SODA CO., LTD.

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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 18, 1987 and granted October 17, 1990. A European patent lasts at most 20 years from filing, so its term ended June 18, 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 18, 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 18, 1987
PublishedDecember 23, 1987
GrantedOctober 17, 1990
Term endedJune 18, 2007
Application numberEP 87108738
Classification (CPC)C08G65/007 +2 more

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

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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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