Tile having a pattern and its manufacturing method
CA 2106053 C · Owner: Kakamu, Yoshinori · Inventors: Kakamu, Yoshinori; Kakamu, Shukichi; Kakamu, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tile having a desired pattern is provided. The pattern goes through the tile in the thickness direction. For manufacturing such a tile e.g. a partition plate 84 is, disposed in a pressure forming die 91 so as to divide its inside space into an outer forming space 95 and an inner forming space 96. Light black granules and light red granules are filled respectively in the outer and inner forming spaces 95, 96. Then, the partition wall 84 is taken out from the die 91, and lining granules are filled over the colored granules. Thereafter, they are pressed into one body and burned.
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 September 13, 1993 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2015.
- 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.