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Constrained geometry addition polymerization catalysts, processes for their preparation, precursors therefor, methods of use, and novel polymers formed therewith

EP 0764654 A2 · Applicant: THE DOW CHEMICAL COMPANY

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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 30, 1990 and never granted as a European patent. Had it been granted, its 20-year term would have ended August 30, 2010.
  • 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 March 1, 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.
FiledAugust 30, 1990
PublishedMarch 26, 1997
GrantedNever granted
Term endedAugust 30, 2010
Application numberEP 96119394
Classification (CPC)C08F10/00 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedAug 30, 1990PublishedMarch 26, 1997Term endedAug 30, 2010

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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