Waveguide antenna
CA 2177626 A1 · Owner: Saab Ericsson Space Aktiebolag · Inventors: Lagerstedt, Anders; Lagerlof, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A waveguide antenna comprising a number of longitudinal waveguides with lateral and longitudinal slots arranged to, emit electromagnetic fields with different directions of polarization is described. It is primarily characterized in that it comprises a first kind of waveguide having a rectangular cross section with lateral slots preferably at, right angles to the longitudinal axis of the waveguide arranged in its first short side. It also comprises a second kind of waveguide having a rectangular cross section with longitudinal slots arranged in its first short side and with a separating wall arranged symmetrically going out from its, second short side partly extending towards its first …
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, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2016.
- 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.