Process for manufacturing targets
CA 2397209 C · Owner: Lawry Shooting Sports Inc. · Inventors: Lawry, Bob
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A process for manufacturing a non-toxic environmentally friendly target comprising petroleum pitch and filler includes the steps of pre-heating the petroleum pitch binder to at least 450°F mixing the petroleum pitch binder with limestone filler so that toxins in the petroleum pitch binder are neutralized and setting the mixture into target molds. The petroleum pitch binder and filler are preferably mixed for at least 2 hours at a temperature of at least 400°F.
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 August 9, 2002 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 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.