Constellation of non-geostationary satellites providing continuous coverage
CA 2208934 C · Owner: Alcatel Espace · Inventors: Lansard, Erick; Frayssinhes, Eric; Palmade, Jean-Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a communication system and/or navigation system based on a constellation of non-geostationary satellites orbiting the Earth. The constellation is grouped by pairs of satellites (S1,S1') (S2,S2') and of orbital planes (P1,P1') (P2,P2'). The pairs of orbital planes are separated by an angle (delta) different from the separation (alpha) between the orbital planes within each pair and the satellites (S1,S1') within each pair present an orbital phase displacement (beta) different from the orbital phase displacement (gamma) between the satellite pairs of different orbital plane pairs. This type of constellation provides continuous coverage of a given geographic area of …
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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 17, 1997 and granted December 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2019.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.