Mono-, di- or tribasic propellants for gun ammunition and method of producing the same
CA 2298513 C · Owner: Nitrochemie Aschau Gmbh · Inventors: Lange, Peter; Seffner-Lehner, Ursula; Jeck-Prosch, Ulrike
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
The invention relates to method of producing monodi- or tribasic propellants for gun ammunition in which , mono-, di- or tribasic propellants are surface-treated with the aid of desensitizing substances. The surface treatment flattens the maximum pressure curve of the propellant in the operating temperature range of the weapon. The desensitizing substances comprise inert or energetic polymers and energetic, monomer softeners or mixtures of the two components.
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 February 10, 2000 and granted February 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2022.
- 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.