Energetic copolyurethane thermoplastic elastomers
CA 2330713 A1 · Owner: Marois, Andre · Inventors: Desilets, Sylvain; Ampleman, Guy; Marois, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
An energetic copolyurethane thermoplastic elastomer is prepared by polymerizing a, dihydroxyl terminated telechelic energetic polymer having a functionality of two or less, with a diisocyanate at a NCO/OH ratio of about 0.7 to 1.2. The resulting copolymer is easy, to incorporate in gun propellant formulations and is recyclable.
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 January 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2023.
- 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.