Automatic dishwashing compositions comprising multiquaternary bleach activators
CA 2175275 C · Owner: Taylor, Lucille Florence · Inventors: Taylor, Lucille Florence; Sivik, Mark Robert; Burckett-St. Laurent, James C. T. Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved detergent compositions, especially granular automatic dishwashing detergents, comprising multiquaternary bleach activators are provided. The bleach activators contain multiple quaternary nitrogen groups preferably at, least three such groups and preferably have at least one quaternary nitrogen group in the peracid-forming portion of the bleach activator as well as at leastone quaternary nitrogen group in the leaving-group portion.
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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 April 29, 1996 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2018.
- 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.