Granular percarbonate laundry bleach containing layered silicate stabilizer
CA 2126847 A1 · Owner: The Procter & Gamble Company · Inventors: Trani, Marina
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A granuler bleaching composition is disclosed which comprises an alkali metal salt of percarbonate and a crystalline layered silicate or mixtures thereof. Preferred compositions further comprise an anhydrous acidifiant agent. The compositions provide effective bleaching and are as stable as perborate based bleaching compositions.
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 December 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 2014.
- 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.