Control of calcium carbonate precipitation in automatic dishwashing
CA 2175331 C · Owner: The Procter & Gamble Company · Inventors: Sadlowski, Eugene Steven
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 weight to weight ratio of calcium complexing component to carbonate source of at least 9 and having a pH between about 7 and about 11 are disclosed. The compositions exhibit enhanced filming performance particularly preferred compositions additionally contain polymer dispersant and silicate.
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 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term 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.