Interactive television system with newsgroups
CA 2820780 C · Owner: Tv Guide, Inc. · Inventors: Ellis, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An interactive television system is provided that supports newsgroups features. An interactive television application such as an interactive television program guide may be used to allow a user to view and post newsgroup messages to one or more newsgroup servers. The newsgroup servers may be located at a television distribution facility. The newsgroup servers may be Usenet servers accessed via the Internet. The user may use the newsgroup feature while watching television programming or while otherwise viewing other content provided by the interactive television application. Cross-referencing may be used to allow the user to access content related to a particular subject matter. Parental …
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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 June 28, 2000 and granted October 10, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.