Nil-phosphate compact automatic dishwashing composition having controlled ph profile
CA 2175330 A1 · Owner: Caravajal, Gregory Stephen · Inventors: Caravajal, Gregory Stephen; You, Jing-Feng; Haeggberg, Donna Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Automatic dishwashing detergent compositions comprising a pH profile wherein the initial wash solution quickly rises to a high alkaline pH followed by a reduction in the pH to yield a final pH of less than 9.5 are disclosed. Compositions are substantially phosphate free and comprise a peroxygen bleach and activator. Particularly preferred compositions are granular and further comprise low levels of silicate for additional glasscare benefits.
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 11, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2016.
- 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.