Expired European patentEurope
Process for making polyamide fiber useful as staple for papermaking machine felt
EP 0683828 B1 · Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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.
Why it's free to use
- Filed February 12, 1993 and granted April 2, 1997. A European patent lasts at most 20 years from filing, so its term ended February 12, 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 August 12, 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.
FiledFebruary 12, 1993
PublishedNovember 29, 1995
GrantedApril 2, 1997
Term endedFebruary 12, 2013
Application numberEP 93905910
Classification (CPC)D01F6/60 +1 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.