Stiffeners for aircraft structural panels
CA 2444227 A1 · Owner: Ochoa, Carlos M. · Inventors: Ochoa, Carlos M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aircraft structural panel (10) of the skin-stiffener type such as is commonly used in aircraft construction has a skin (15) supported by uniformly spaced stiffeners or frames (39). Stiffeners (39) are secured to skin (15) and extend outwardly from the associated skin (15). Each stiffener (39) has a horizontal body (38), an inner mounting flange (41) and an outer bowed flange , (42). Mounting flange (41) and bowed flange (42) have free edges and respective inturned beads or curls (44 46) are formed thereon for stiffening of flanges (41) and (42).
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 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 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.