Lead-free primer mix
CA 2232744 C · Owner: Lopata, Frances G. · Inventors: Lopata, Frances G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordNo Claude kit for weapons
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Abstract From the Canadian patent
A lead-free primer mix based on diazodinitrophenol tetrazene, nitrocellulose, barium nitrate and at least one of PETN aluminum and antimony sulfide , exhibits performance characteristics comparable to lead styphnate compositions.
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 September 26, 1996 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2018.
- 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.