Improved polyurethane resins
CA 2280232 A1 · Owner: Handley Industries Limited · Inventors: Meadowcroft, John; Scott, Timothy George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved polyurethane derived resin for casting pultrusion and lamination, purposes, particularly fibreglass lamination purposes. The resin is produced from the, reaction of an isocyanate compound with an hydroxylated acrylic and a polyol. Photoinitators may be included in the resin to allow effective curing under ultra violet, light.
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 August 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 2021.
- 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.