Process for the manufacture of granular detergent compositions comprising nonionic surfactant
CA 2208675 C · Owner: Smith, David John · Inventors: Donoghue, Scott John; Smith, David John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the manufacture of detergent compositions or components from a surfactant paste which is substantially in the solid phase at temperatures of 25 ~C and below comprising the steps of: (i) mixing the surfactant paste at a temperature above its softening point the surfactant paste comprising at least 50 % by weight of nonionic surfactant; (ii) forming the molten surfactant paste into drops on a cooling surface; (iii) forming solid pastilles by cooling the drops of molten surfactant paste; and (iv) removing solidified pastilles from the cooling surface. The invention also relates to pastillated granulated detergent compositions or components made by …
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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 January 5, 1996 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 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
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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.