Bituminous polyurethane interpenetrating elastomeric network compositions
CA 2341202 A1 · Owner: Rajalingam, Ponswamy · Inventors: Rajalingam, Umarani; Rajalingam, Ponswamy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The elastomeric polyurethane interpenetrating network compositions of the invention are developed by in situ reaction of polyols with different isocyanates and polyisocyanates in bituminous material. (2) Suitable bituminous materials include asphalt, coal tar polymer modified asphalt, oxidized, and unoxidized asphalt. (3) The composition is preferably formed at a temperature between 200 ~ F and 350 ~F. The reaction kinetics can be accelerated by including catalysts and curing agents. (4) The bituminous polyurethane interpenetrating network elastomeric compositions were hotsprayed-applied (200 ~F-350 ~F) on concrete metal, wood, built-up roofing , systems polyurethane foams, and other …
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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
- Filed August 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 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
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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.