Expired Canadian patentCanada
Liquid cleaning compositions containing selected mid-chain branched surfactants
CA 2252434 C · Owner: Cripe, Thomas Anthony · Inventors: Vinson, Phillip Kyle; Foley, Peter Robert; Connor, Daniel Stedman
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a liquid cleaning composition comprising a surfactant system containing selected mid-chain branched surfactant and cosurfactants.
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 April 16, 1997 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 16, 1997
GrantedDecember 3, 2002
Term endedApril 16, 2017
Patent numberCA 2252434 C
Classification (IPC)C11D1/14 +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.