Expired European patentEurope
Filler for liquid chromatography, method for separating water-soluble substances using said filler and use of said filler in separating water-soluble biochemical substances
EP 0021817 B1 · Applicant: SEKISUI KAGAKU KOGYO KABUSHIKI KAISHA
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 June 20, 1980 and granted October 2, 1985. A European patent lasts at most 20 years from filing, so its term ended June 20, 2000.
- 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 December 20, 2005.
- 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.
FiledJune 20, 1980
PublishedJanuary 7, 1981
GrantedOctober 2, 1985
Term endedJune 20, 2000
Application numberEP 80302102
Classification (CPC)B01J20/262 +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.