Tough and durable insulation boards produced in-part with scrap rubber materials and related methods
CA 2409902 A1 · Owner: Douglas, Bruce F. · Inventors: Letts, John B.; Brandt, Greg A.; Douglas, Bruce F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite recovery board (10, 20, 30) comprises a foam core (11) having lower (12) and upper (13) surfaces wherein the foam core is selected , from the group consisting of polyisocyanurate and polyurethane materials and mixtures thereof; and a filler within said foam core selected from the group consisting of, rubber-tire vents, EPDM scrap material plastic chips, polyurethane scrap, polyisocyanurate scrap scrap rubber from recycled tires, wood chips fiberglass, strands and mixtures thereof. A method of re-roofing a roof comprising applying, composite boards (10, 20, 30) of the present invention to a roof deck and applying a, weather protective layer over the composite boards. A …
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, and the Claude kit works from them.
Why it's free to use
- Filed October 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 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.