Space duplexed beamshaped microstrip antenna system
CA 2100021 C · Owner: Gans, Lawrence S. · Inventors: Gans, Lawrence S.; Schwartz, Leonard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A space duplexed beamshaped microstrip antenna system including transmit and receive antennas each of which, has two groups of interleaved arrays. The array groups are slanted in opposite directions and each is fed from opposite corners of the antenna so that each group utilizes its entire assigned reduced width aperture to create the required beam contours for two beam. To achieve frequency and temperature compensation one of, the antennas is made up of forward firing arrays and the other of the antennas is made up of backward firing arrays.
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 July 7, 1993 and granted October 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2015.
- 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.