Expired Canadian patentCanada
Systems and methods for supplementing on-demand media
CA 2425472 C · Owner: Itek Consulting, Inc. · Inventors: Easterbrook, Kevin B.; Berezowski, David M.; Ellis, Michael D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods for providing supplemental content with on-demand media in an interactive television application 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 October 9, 2001 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 9, 2001
GrantedJanuary 10, 2012
Term endedOctober 9, 2021
Patent numberCA 2425472 C
Classification (IPC)H04N21/46 +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.