Carpet spot removal composition
CA 2398720 C · Owner: Levitt, Mark Dennis · Inventors: Levitt, Mark Dennis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a carpet cleaning composition comprising about 50 % by weight to about 98 % by weight water; about 0.05 % by weight to about 2 % wt-% of at least one emulsifier that is an acrylic copolymer; about 1 % by weight to about 50 % by weight of at least one solvent; 0 % to about 1 % by weight of at least one surfactant; and at least one alkaline compound for buffering. The resultant cleaning composition has an adjusted pH from about 4 to about 10.
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 January 5, 2001 and granted May 24, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 2023.
- 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.