Bleaching agent compositions
CA 2263279 C · Owner: Kobayashi, Tsuneo · Inventors: Mikami, Masahito; Hiro, Yasuo; Kuriyama, Yasuhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bleaching agent composition is presented which comprises hydrogen peroxide or a peroxide which generates hydrogen peroxide and an addition reaction , product of dicyandiamide and a glycidyl ether compound wherein the pH of the , aqueous solution of the mixture thereof becomes at least 7.5. The bleaching agent composition has an excellent bleaching effect on clothes and the like and has excellent bleaching power to the mildew generated on the walls of a house or furniture, and does not have any odor.
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 August 15, 1997 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 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.