Storage stable polymerizable composition
CA 1296443 C · Owner: Hart, Duane H. · Inventors: Hart, Duane H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
60557-3382, Abstract of the Disclosure An extrudable epoxy resin and curing agent that polymerize when mixed are separated by an extrudable barrier layer disposed between and in contacting relationship with the epoxy resin and curing agent. The material of the barrier layer is insoluble in the epoxy resin and curing agent while being dispersible in a mixture of them. The barrier layer material is selected from hydrogenated rosin ester, terpene phenolic resin alpha-, pinene resin and polybutene. The epoxy resin curing agent and, barrier layer have sufficiently similar rheologies at the temperature at which they are to be extruded from their container to ensure against intermixing until after …
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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, and the Claude kit works from them.
Why it's free to use
- Granted February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.