The lemniscate antenna element
CA 2303703 C · Owner: Podger, James Stanley · Inventors: Podger, James Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna element is disclosed that is a pair of approximately coplanar loops, having, perimeters of approximately one wavelength that are connected at one point. , The loops are positioned so that a line through centre of one loop and that common point also is the line through, the centre of the other loop. The approximate shape of these loops is such that the distance from, that common point to any point on either loop is proportional to the cosine raised to some power, of a multiple of the angle between that centre line and a line between the common point and the, point on the loop. Compared to previous antenna elements constructed for the same purposes, antennas constructed with …
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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 March 30, 2000 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.