Preparation of inorganic hardenable slurry and method for solidifying wastes with the same
CA 2106747 C · Owner: Huang, Ching-Tsven · Inventors: Yang, Wen-Yi; Huang, Ching-Tsven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention discloses a method for preparing the inorganic hardenable slurry and the use of same in the solidification of wastes, In addition to water the essential, parts of the slurry are inorganic components including borates cement-base powder and other additives such as magnesium oxide gypsum and silica. The slurry is low in viscosity before solidification and flows freely, and within approximately 30 minutes after preparation the slurry becomes hardened into a highly solidified substance, The solidification of the slurry is resulted mainly from reaction of borates and the cement-base powder and to obtain a best result the weight of borates must be the same as that of the …
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 22, 1993 and granted August 19, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 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.