Composite article
CA 2531799 C · Owner: Meggitt Aerospace Limited · Inventors: Johnson, David Callum
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite article (21) for use in an aircraft brake heat pack the article , comprises a core layer (22) having a face portion and a wear layer (23) attached to the face portion, wherein the wear layer (23) has a density lower than the core layer (22). The core layer (22) may be fabricated from compressed C-C or from C-C impregnated with boron and/or silicon. The wear layer (23) may be fabricated from C-C.
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 July 8, 2004 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2026.
- 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.