Expired European patentEurope
Acicular magnetic iron pigments with an adjustable coercive force, and process for their production; Fe metal pigments for magnetic recording with an adjustable coercive force
EP 0379062 B1 · Applicant: Studiengesellschaft Kohle mbH
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 January 11, 1990 and granted June 1, 1994. A European patent lasts at most 20 years from filing, so its term ended January 11, 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 July 11, 2015.
- 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.
FiledJanuary 11, 1990
PublishedJuly 25, 1990
GrantedJune 1, 1994
Term endedJanuary 11, 2010
Application numberEP 90100502
Classification (CPC)G11B5/70615
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.