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Expired European patentEurope

Use of the variation of the ratio of Mg:Ti in a catalyst to vary or control the short chain branching distribution of ethylene copolymers

EP 0705282 B1 · 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 March 17, 1993 and granted July 29, 1998. A European patent lasts at most 20 years from filing, so its term ended March 17, 2013.
  • 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 17, 2018.
  • 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 17, 1993
PublishedApril 10, 1996
GrantedJuly 29, 1998
Term endedMarch 17, 2013
Application numberEP 93908549
Classification (CPC)C08F10/00

Timeline

Timeline From EPO dates

1994199619982000200220042006200820102012Application filedMarch 17, 1993PublishedApril 10, 1996Patent grantedJuly 29, 1998Term endedMarch 17, 2013

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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