Grout composition
CA 2087111 A1 · Owner: Rooshenas, Rezvan · Inventors: Rooshenas, Rezvan; Lu, Daniel C.; Rooshenas, Rezvan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention features an indelibly colored grout composition and a method of making it. The grout of the invention mixes pre-colored materials such as stone sand, plastic or ceramic aggregates with a resin binder. In the case of ceramics, the materials are pre-colored and color-fast, so that they resist fading and attach from stains and chemicals. The color-fast materials can be natural or man-made and, if man-made, can be pretreated and, permanently coated. In the case of stone the natural, colors are permanently inherent in the stone matrix and will not fade or leach out. An ultraviolet blocker is also added to the mixture to prevent the binder from yellowing when exposed to …
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 January 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 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.