Expired European patentEurope
New dye releasing compounds and their use in photographic silver halide colour materials for the production of colour images by a dye diffusion transfer process
EP 0111199 B1 · Applicant: AGFA-GEVAERT naamloze vennootschap
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 November 21, 1983 and granted July 16, 1986. A European patent lasts at most 20 years from filing, so its term ended November 21, 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 May 21, 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.
FiledNovember 21, 1983
PublishedJune 20, 1984
GrantedJuly 16, 1986
Term endedNovember 21, 2003
Application numberEP 83111614
Classification (CPC)G03C8/10
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.