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Expired Canadian patentCanada

Printed or etched, folding, directional antenna

CA 2354689 C · Owner: Tantivy Communications, Inc. · Inventors: Snyder, Christopher A.; Palmer, William Robert; Jorgenson, David C.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An antenna array formed on a deformable dielectric material or substrate includes a center element and plurality of radial elements extending from a center hub. In the operative mode the radial elements are folded upwardly into an approximately vertical position with the center element at the center of the hub and the radial elements circumferentially surrounding the center element. In one embodiment the center element serves an active element of the antenna array and the radial elements are controllable in a directive or reflective state to effect a directive beam pattern from the antenna array. When not in use the antenna elements are deformed into a plane and can therefore be integrated …

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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 August 2, 2001 and granted January 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2023.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 2, 2001
GrantedJanuary 11, 2011
Term endedAugust 2, 2021
Patent numberCA 2354689 C
Classification (IPC)H01Q21/00 +2 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedAug 2, 2001Patent grantedJan 11, 2011Term endedAug 2, 2021

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.