Process for producing dryer-added fabric softener sheets containing cyclodextrin complexes
CA 2173436 C · Owner: Bacon, Dennis Ray · Inventors: Bacon, Dennis Ray; Trinh, Toan; Palmer, Clyde Dewayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cyclodextrin complexes are prepared utilizing processes in which the cyclodextrin/active complex is prepared under concentrated reaction conditions in which there is no more than about 40 % solvent e.g. water, with mechanical working, to provide a complex ultimate particle size of less than about 12 microns and the resulting complex reaction mixture is incorporated preferably without further operation, into at least one fabric conditioning material preferably cationic fabric conditioning active preferably in liquid (molten) form, preferably at a temperature between about 60 and about 95°C and mechanically worked to reduce complex aggregate particle size below about 200 microns. The …
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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 October 7, 1994 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2016.
- 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.