Gun barrel lining of composite material, its method of manufacture, and a gun barrel provided with such a lining
CA 2070071 C · Owner: Taveau, Pierre · Inventors: Habarou, Georges; Vives, Michel; Bognandi, Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A gun barrel lining made of composite material having refractory fiber reinforcement and a ceramic matrix the fiber reinforcement comprises a, cylindrical inner portion constituted by a three-dimensional fiber texture and acylindrical outer portion surrounding the inner portion and having the same axis, the outer portion being constituted by a strip wound around the inner portion, and the inner and outer portions being codensified by the ceramic matrix.
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.
Why it's free to use
- Filed May 29, 1992 and granted March 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2014.
- 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.