Attenuation fin blanket for a feed horn
CA 2134384 C · Owner: Hughes Aircraft Company · Inventors: Faherty, William C.; Gawlas, Gary J.; Reynolds, Robert Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A feed horn (100) includes a top side (114) and a bottom side (116). A left side (118) connects one edge of the top side (114) with one edge of the bottom side (116). A right side (120) connects an opposite edge of the top side (114) with an opposite edge of the bottom (116). The improved feed horn (100) includes an attenuation device (130, 199) connected to an outer surface of at least one of the top and bottom sides (114, 116) for absorbing microwave energy of far-out side lobes. The attenuation means (130, 199) includes a plurality of fins (134 200, 202). The top and bottom sides are normal to an electric field (E) to be radiated.
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 26, 1994 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.