Expired European patentEurope
Diesel particulate trap of perforated tubes wrapped with cross-wound inorganic yarn to form 4-sided filter traps
EP 0578729 B1 · Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
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.
Why it's free to use
- Filed March 31, 1992 and granted December 7, 1994. A European patent lasts at most 20 years from filing, so its term ended March 31, 2012.
- 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 October 1, 2017.
- 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 31, 1992
PublishedJanuary 19, 1994
GrantedDecember 7, 1994
Term endedMarch 31, 2012
Application numberEP 92909273
Classification (CPC)B01D46/0005 +2 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.