Expired Canadian patentCanada
Nonaqueous detergent compositions containing specific alkyl benzene sulfonate surfactant
CA 2258669 C · Owner: Smerznak, Mark Allen · Inventors: Goderis, Iwein Jozef Maria Jaak; Parry, Diane; Jones, Roger Jeffery
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 nonaqueous liquid detergent containing a surfactant selected from the alkali metal salts of C10-C16 alkylbenzene sulfonic acid having 2-phenyl isomer content lower than 22 %.
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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 June 24, 1997 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 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.
FiledJune 24, 1997
GrantedMay 21, 2002
Term endedJune 24, 2017
Patent numberCA 2258669 C
Classification (IPC)C11D1/22 +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.