Cleaning composition
CA 2201923 C · Owner: Brown, Colin W. · Inventors: Hart, Gerald L.; Brown, Colin W.; Holmes, David F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aerosol foam cleaning composition for carpets and soft-furnishings is provided with a fluorine-containing stain repellent the proportions of stain , repellent, foam-stabilizer polymer surfactant, and foam booster being , balanced to provide a stable foam i.e. one which does not release hydrocarbon propellant at such a rate as to create flammability problems with adequate , cleaning properties and an adequate residue of stain repellent.
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 October 5, 1995 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2017.
- 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.