Patch antenna using non-conductive frame
CA 2322735 C · Owner: Papatheodorou, Stelios · Inventors: Guinn, Keith V.; Van Egmond, Maarten; Tsai, Ming-Ju
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-conductive frame supports the resonators in a patch antenna assembly. The, frame supports the resonators without making holes in the resonators and thereby avoids, the problem of creating unwanted electric field polarizations. Additionally the frame, grasps the resonators in areas of low current density and thereby avoids creating, additional disturbances in the radiation pattern. The frames may also include posts that, are used to attach the frames to the feedboard without using additional components such, as screws.
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 10, 2000 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 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.