Improvements relating to bleaching compositions
CA 2255809 A1 · Owner: De Medeiros, Ana Claudia Marquezano · Inventors: Cropper, James Dawson; Luppi, Eduardo Jnr; De Medeiros, Ana Claudia Marquezano
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an aqueous bleaching composition of pH 1-3 which comprises: a) 0.1-15 w.t.% surfactant; b) 3-15 w.t.% hydrogen peroxide or a source thereof; c) 0.5-10 w.t.% disodium dihydrogen pyrophosphate; d) 0.1-3 w.t.% of at least one metal ion complexing agent other than (c); and e) 0.01-1 w.t.% perfume. The invention also provides a process for removing stains from textile articles which comprises the step of treating the articles with a composition as described above.
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 June 10, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2019.
- 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.