Hypochlorite bleaching composition having enhanced fabric whitening benefits
CA 2232595 C · Owner: The Clorox Company Of Canada Ltd. · Inventors: Mercado, Hedeliza Malonzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous liquid bleaching composition having a pH of from 9 to 14 is disclosed which is particularly suitable as a pre-wash and laundering composition for fabrics. The composition comprises (a) an alkali metal hypochlorite; (b) an alkali metal carbonate; (c) an alkali metal hydroxide; and (d) an alkali metal phosphate. The method of bleaching fabric with said bleaching composition is also described.
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 11, 1997 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 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.