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Expired European patentEurope

Apparatus and process for crimping fibers

EP 0507847 B1 · Applicant: THE DOW CHEMICAL 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 October 31, 1990 and granted December 27, 1995. A European patent lasts at most 20 years from filing, so its term ended October 31, 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 May 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.
FiledOctober 31, 1990
PublishedOctober 14, 1992
GrantedDecember 27, 1995
Term endedOctober 31, 2010
Application numberEP 91902323
Classification (CPC)D01F9/32 +2 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedOct 31, 1990PublishedOct 14, 1992Patent grantedDec 27, 1995Term endedOct 31, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.