Non-lead, environmentally safe projectiles and method of making same
CA 2194487 C · Owner: Lockheed Martin Energy Systems, Inc. · Inventors: Dooley, Joseph B.; Lowden, Richard A.; Mccoig, Thomas M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A projectile, such as a bullet (18), is made by combining two different metals in proportions calculated to achieve a desired density without using lead. A , base constituent made of a material having density greater than lead is , combined with a binder constituent having a less density. The binder constituent is malleable and ductile metallic phase material that forms projectile shapes when subjected to a consolidation force such as , compression. The metal constituents can be selected rationed, and , consolidated to achieve desired frangibility characteristics.
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 June 29, 1995 and granted June 6, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2017.
- 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.