Co-catalysis of autocatalytic polyols for low density polyurethane foams with improved aging characteristics
CA 2556700 C · Owner: Dow Chemical Canada Inc. · Inventors: Dawe, Robert D.; Casati, Francois M.; Prange, Robbyn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention pertains to the co-catalysis of autocatalytic aminebased polyols with acid blocked, gelling amine catalysts, and to the use of this catalyst combination in the production of low density polyurethane foams having improved aging characteristics and reduced VOC's (Volatile Organic Compounds) emissions.
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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 April 27, 2005 and granted January 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.