Expired European patentEurope
Organoclay compositions prepared with a mixture of two organic cations and their use in non-aqueous systems
EP 0542266 B1 · Applicant: RHEOX INTERNATIONAL, INC.
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 November 12, 1992 and granted February 7, 1996. A European patent lasts at most 20 years from filing, so its term ended November 12, 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 May 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.
FiledNovember 12, 1992
PublishedMay 19, 1993
GrantedFebruary 7, 1996
Term endedNovember 12, 2012
Application numberEP 92119368
Classification (CPC)C09D5/04 +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.