Expired European patentEurope
Catalyst for the oxidation of mercaptans to disulfides, process for its preparation and its use in the sweetening of petroleum distillates
EP 0091845 B1 · Applicant: COMPAGNIE FRANCAISE DE RAFFINAGE Société anonyme dite:
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
Read the whole patent
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 17, 1983 and granted December 4, 1985. A European patent lasts at most 20 years from filing, so its term ended March 17, 2003.
- 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 September 17, 2008.
- 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 17, 1983
PublishedOctober 19, 1983
GrantedDecember 4, 1985
Term endedMarch 17, 2003
Application numberEP 83400556
Classification (CPC)B01J31/08 +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.