Canadian application, no grantCanada
Novel diazo derivatives and process for their preparation
CA 2392282 A1 · Owner: Zappala', Antonio · Inventors: Zappala', Antonio; Giumanini, Angelo; Gorassini, Andrea
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel diazo derivatives useful for the deacidification of paper material and the, process for their preparation comprising three steps starting from an amine and, ethyl chlorocarbonate, are described.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 3, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 3, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 3, 2002
GrantedNo grant recorded
Term endedJuly 3, 2022
Patent numberCA 2392282 A1
Classification (IPC)C07C245/12 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.