Single phase aqueous surfactant-free nontoxic air freshening composition and wick-containing air freshening device using said composition
CA 2316541 A1 · Owner: International Flavors & Fragrances Inc. · Inventors: Boden, Richard M.; Ruizendaal, Jan-Willem Zacharias; Van Walsum, Arnoud
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described is a single phase aqueous surfactant-free nontoxic air freshening composition containing 30-70% water, 5-20% of a fragrance at least 60% of the, components of which has a C log10P~2.5 and 30-60 weight percent of a mixture of, two glycol ether components:, (i) dipropylene glycol methyl ether; and (ii) propylene glycol propyl ether or propylene glycol butyl ether. Also described is an air freshener device comprising a vessel for the aforementioned, composition, an emanating surface and a wick for supplying the composition to the, emanating surface.
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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 August 22, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 22, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2022.
- 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.