Solid, particulate fabric softener with protected, dryer-activated cyclodextrin/perfume complex
CA 2115544 A1 · Owner: Trinh, Toan · Inventors: Bacon, Dennis Ray; Trinh, Toan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fabric softening compositions for use in the rinse cycle of home laundry operations are improved by using certain protected water sensitive materials, especially particulate complexes of cyclodextrins and perfumes, which are protected in fabric softening compositions and/or detergent compositions by e.g. imbedding said, particulate complex in relatively high melting protective material that is substantially water-insoluble and preferably, non-water-swellable and is solid at normal storage conditions but which, melts at the temperatures encountered in automatic fabric dryers (laundry dryers).
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 August 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2014.
- 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.