Semi-flexible or flexible phenolic foam composition
CA 1331073 C · Owner: Sudan, Krishan · Inventors: Sudan, Krishan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A semi-flexible or flexible phenolic foam composition having a substantially open cellular structure. It comprises the reaction product of a mixture of a phenol-aldehyde resin, a surfactant a blowing agent;, optionally a wetting agent and a catalyst. Also within the scope of the present invention is a method for producing a semi-flexible or flexible phenolic foam composition having a substantially opened cellular structure. This method comprises mixing a phenol-aldehyde resin with a surfactant, a blowing agent and optionally a cell opening and wetting agent; curing the mixture by reacting it with an acid catalyst; compressing the cured or semi-cured product below its original thickness and …
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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 July 26, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 26, 2011.
- 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.