Expired Canadian patentCanada
Control of calcium carbonate precipitation in automatic dishwashing
CA 2175329 C · Owner: The Procter & Gamble Company · Inventors: Sadlowski, Eugene Steven
Overview
Drawings and full text
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 carbonate source and a pH from about 5.0 to about 9.5 for enhanced filming performance are disclosed. Particularly preferred compositions 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 January 18, 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.
FiledOctober 11, 1994
GrantedJanuary 18, 2000
Term endedOctober 11, 2014
Patent numberCA 2175329 C
Classification (IPC)C11D3/10 +2 more
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.