Method and apparatus for improving the washing ability of wash water in a washing machine
CA 2223621 C · Owner: Roberts, Denzil Simon · Inventors: Roberts, Denzil Simon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A washing method performed in a washing machine having a wash basket for containing wash water and a wash load includes the step of attaching a tile 10 of ceramic as shown in Figure 1, or tile assembly made of ceramic as shown in Figures 5 and 11, so that the tile 10 is exposed to the wash water in wash basket 12. A laundry tile 10 of ceramic material as shown in Figure 1 or tile assemblyas shown in Figures 5 and 11 is provided. It comprises a front side 14 and a rear side 18, wherein the front and rear sides are unglazed. In one embodiment attachment strips 20 and 22 are provided for attaching the tile 10 as shown in Figure 1, or tile assembly as shown in Figures 5 and 11 by its rear side …
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 February 18, 1998 and granted November 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 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.