Stain resistant treatment for porous substrates
CA 2462274 A1 · Owner: Chen, Yen-Lane · Inventors: Chen, Yen-Lane
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous composition that includes silane including n-alkylalkoxysilane condensates of n-alkylalkoxysilane or a combination thereof and from about , 0.01 % by weight to about 2 % by weight cationic quaternary surfactant. The composition optionally includes a siloxane selected from the group consisting of methylhydrogen siloxane, methylhydrogen-methylalkyl siloxane copolymer methylhydrogen-cyclosiloxane copolymer methylhydrogen-methylalkyl , cyclosiloxane copolymer and combinations thereof and volatile carrier.
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 September 6, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 2024.
- 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.