Detersive system containing water soluble film article
CA 2085985 C · Owner: Ecolab Inc. · Inventors: Ihns, Deborah A.; Olson, Keith E.; Besse, Michael E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The stability of polyvinyl films used to contain detersive systems may be enhanced by the use of a barrier coating composition to separate the film degrading components i.e. acids, bases, and halogens, from these films. The barrier coatings mayeither encapsulate the individual film degrading components or, they may coat the entire detersive system.
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 28, 1991 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 2013.
- 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.