Aerodynamic article with protective coating and method of bonding metal to polyurethane
CA 2440470 A1 · Owner: Leach, Roger · Inventors: Leach, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To protect an article with an aerodynamic surface such as an aeroplane , propeller or helicotper rotor from erosive damage caused by flying , particulate matter a thin elastomeric protective covering is provided. This layer covers approximately 15% of a forward face (15) a leading edge (12), and approximately 90% of the rear face (13) of the article. Typically it is made of polyurethane with hardness between 85 Shore A and 80 Shore D. It is applied by centrifugal casting using a silane (eg gammaglycidoxypropyltrimethoxysilane) as a coupling agent when bonding to a metal surface such as aluminium.
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 March 11, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2024.
- 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.