Antenna arrangement
CA 2188136 C · Owner: Delaval International Ab · Inventors: Finlayson, John Douglas Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna arrangement including: a passageway having at least one side and an antenna (1) located in a substantially vertical plane of the side. The antenna (1) has one or more coils (2 3, 4, 5) each having a corner (6) and adjacent straight portions oriented at an acute angle (X) to a floor surface of the passageway. The acute angle (X) is preferably 30° to floor surface (18).
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 April 18, 1995 and granted December 31, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 18, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 18, 2017.
- 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.