Expired European patentEurope
Chloroacetanilides, their preparation, their use, compositions containing them, and method of combating undesired plant growth
EP 0123327 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
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 February 24, 1984 and granted September 9, 1987. A European patent lasts at most 20 years from filing, so its term ended February 24, 2004.
- 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 August 24, 2009.
- 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.
FiledFebruary 24, 1984
PublishedOctober 31, 1984
GrantedSeptember 9, 1987
Term endedFebruary 24, 2004
Application numberEP 84200268
Classification (CPC)C07D241/12 +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.