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Expired European patentEurope

The preparation of linear polyethylene polyamines with silica-alumina catalysts

EP 0150558 B1 · Applicant: TEXACO DEVELOPMENT CORPORATION

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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 September 11, 1984 and granted September 6, 1989. A European patent lasts at most 20 years from filing, so its term ended September 11, 2004.
  • 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 11, 2010.
  • 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.
FiledSeptember 11, 1984
PublishedAugust 7, 1985
GrantedSeptember 6, 1989
Term endedSeptember 11, 2004
Application numberEP 84306192
Classification (CPC)C07C209/16

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedSep 11, 1984PublishedAug 7, 1985Patent grantedSep 6, 1989Term endedSep 11, 2004

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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