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Expired European patentEurope

Use of water-soluble polymers in aqueous chemical light formulations

EP 0175889 B1 · Applicant: AMERICAN CYANAMID COMPANY

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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 2, 1985 and granted November 2, 1988. A European patent lasts at most 20 years from filing, so its term ended August 2, 2005.
  • 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 2, 2011.
  • 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 2, 1985
PublishedApril 2, 1986
GrantedNovember 2, 1988
Term endedAugust 2, 2005
Application numberEP 85109759
Classification (CPC)C09K11/07

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedAug 2, 1985PublishedApril 2, 1986Patent grantedNov 2, 1988Term endedAug 2, 2005

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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