Expired European patentEurope
Quinazoline derivatives, processes for their preparation, compositions containing them and their use as anti-cancer agents
EP 0031237 B1 · Applicant: NATIONAL RESEARCH DEVELOPMENT CORPORATION
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 December 16, 1980 and granted October 17, 1984. A European patent lasts at most 20 years from filing, so its term ended December 16, 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 June 16, 2006.
- 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.
FiledDecember 16, 1980
PublishedJuly 1, 1981
GrantedOctober 17, 1984
Term endedDecember 16, 2000
Application numberEP 80304539
Classification (CPC)C07D205/04 +1 more
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.