Laundry composition containing dye fixatives and cellulase
CA 2213834 C · Owner: The Procter & Gamble Company · Inventors: Masschelein, Axel; Baker, Ellen Schmidt; Hubesch, Bruno Albert Jean
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Laundry compositions, specifically fabric-conditioning compositions for use in the rinse cycle of laundry washing processes and, which improve colour-depth maintenance over single or multiple washing cycles. In order to achieve this improvement the laundry, compositions contain a cellulase enzyme at a level ranging from 0.05 CEVU/gram to 125 CEVU/gram of finished product and a cationic dye-fixing agent within the range of 0.01 to 50 % by weight of finished product.
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 March 4, 1996 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2018.
- 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.