Canadian application, no grantCanada
Shadow mask for cathode ray tube and method of manufacturing same
CA 2254836 A1 · Owner: Samsung Display Devices Co. Ltd. · Inventors: Moon, Sung-Hwan; Han, Seung-Kwon; Han, Dong-Hee
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A shadow mask for a cathode ray tube includes a surface hardening layer and a solid-solution and precipitation hardening layer formed under the surface hardening layer.
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 November 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 30, 1998
GrantedNo grant recorded
Term endedNovember 30, 2018
Patent numberCA 2254836 A1
Classification (IPC)H01J29/07 +1 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.