Expired Canadian patentCanada
Nesting pylon
CA 2055516 C · Owner: Bennett, Reginald S. · Inventors: Bennett, Reginald S.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A truncated pyramidal pylon, has retro-reflectant side walls each sloping at 8° - 10° to the vertical for helicopters and 3° - 6° to the vertical for fixed wing aircraft. The pylon is downwardly open and, designed for nesting.
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 November 14, 1991 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 14, 1991
GrantedApril 11, 2000
Term endedNovember 14, 2011
Patent numberCA 2055516 C
Classification (IPC)B64F1/18
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.