Expired European patentEurope
Spent antimony halide catalysts treatment
EP 0366366 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 October 20, 1989 and granted April 8, 1992. A European patent lasts at most 20 years from filing, so its term ended October 20, 2009.
- 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 April 20, 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.
FiledOctober 20, 1989
PublishedMay 2, 1990
GrantedApril 8, 1992
Term endedOctober 20, 2009
Application numberEP 89310799
Classification (CPC)B01J27/32
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.