Solid, particulate detergent composition with protected, dryer-activated, water sensitive material
CA 2115541 C · Owner: The Procter & Gamble Company · Inventors: Bacon, Dennis R.; Trinh, Toan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Detergent 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 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term 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.