Expired European patentEurope
Novel urea derivative, a process for its preparation, herbicidal composition containing it, a method of combating undesired plant growth using it
EP 0015605 B1 · Applicant: SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
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 February 19, 1980 and granted February 9, 1983. A European patent lasts at most 20 years from filing, so its term ended February 19, 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 August 19, 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.
FiledFebruary 19, 1980
PublishedSeptember 17, 1980
GrantedFebruary 9, 1983
Term endedFebruary 19, 2000
Application numberEP 80200141
Classification (CPC)C07C275/34
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.