Process for producing a particulate laundry additive for perfume delivery having improved physical properties
CA 2257987 A1 · Owner: Perkis, David Frederick · Inventors: Cutter, Gary Ray; Perkis, David Frederick; Angell, John Waynforth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a particulate laundry additive composition for perfume delivery primarily in laundry detergent and fabric softening products is disclosed. The process essentially includes the steps of drying an aqueous mixture of a pigment and an encapsulating material to form a fluid that preferably is devoid of water or at least has a portion of the water evaporated by this drying step, and thereafter extruding an encapsulating , material, preferably a glassy carbohydrate material with porous carrier , particles, preferably loaded with a perfume so as to form a hot extrudate. , Subsequently the steps of cooling and grinding the extrudate into particles is completed.
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 June 10, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 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.
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.