Rapid set latexes and foamed articles prepared therefrom
CA 2322137 A1 · Owner: Schmidt, Donald L. · Inventors: Schmidt, Donald L.; Rose, Gene D.; Harris, John K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Rapid set cellular articles can be prepared from a latex by the steps of: a) frothing a latex that contains a dispersed polymer having pendant cationic groups or adsorbing cationic molecules or both and pendant acid groups; and , b) rendering the frothed latex sufficiently basic to make the cellular article. The cellular articles of the present invention are advantageously prepared at ambient temperatures and pressures and in the absence of organic , solvents or CFCs.
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 February 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 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.