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Expired European patentEurope

Preparation of discrete microdroplets of an oil in water stabilized by in situ polymerization of a water-soluble vinyl monomer

EP 0524973 B1 · Applicant: ISP INVESTMENTS INC.

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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 March 22, 1991 and granted January 8, 1997. A European patent lasts at most 20 years from filing, so its term ended March 22, 2011.
  • 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 September 22, 2016.
  • 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.
FiledMarch 22, 1991
PublishedFebruary 3, 1993
GrantedJanuary 8, 1997
Term endedMarch 22, 2011
Application numberEP 91906950
Classification (CPC)A61K8/11 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedMarch 22, 1991PublishedFeb 3, 1993Patent grantedJan 8, 1997Term endedMarch 22, 2011

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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