Method for the manufacture of molded reconstituted granite slabs
CA 2037473 A1 · Owner: Chase, Allan C. · Inventors: Chase, Allan C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method for the production of reconstituted granite slabs is disclosed. Crushed granite, or other suitable particulate is combined with hydraulic, cement, such as Portland cement and water. The resultant mixture is placed in a mold and vibrated prior to the application of hydraulic pressure. The vibration of the product within the mold results in the larger granite particles moving to the top of the mixture. After the application of pressure, the slab is removed from the mold cured, ground and polished. The surface of the slab is high in granite concentration and provides a strong impermeable 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, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2013.
- 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.