Multi-layer detergent tablet having both compressed and non-compressed portions
CA 2278557 C · Owner: Thoen, Christiaan Arthur Jacques Kamiel · Inventors: Thoen, Christiaan Arthur Jacques Kamiel; Song, Xiaoqing; Scheper, William Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A detergent tablet comprising i) a compressed solid body portion having therein at least one mould in said compressed solid body portion; and ii) at least one non-compressed, non-encapsulating portion mounted in said at least one mould of said compressed solid body portion having an area of B, said at , least one non-compressed non-encapsulating portion comprising at least one detergent active; wherein surface area of said detergent tablet excluding , area of said at least one mould is A; and wherein further ratio of B to A is from about 1:50 to about 4:1, by area.
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 November 5, 1998 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 5, 2020.
- 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.