Dry process gunning of refractory castable
CA 2204330 C · Owner: Bogan, Jeffrey E. · Inventors: Gerber, Jerry; Bonsall, Samuel B. Iii; Bogan, Jeffrey E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for applying a refractory castable onto a surface comprising the, steps of: (a) introducing metered amounts of a clay-free dry refractory castable, into a delivery hose the dry refractory castable having an alumina content of about 40-95%; (b) conveying the dry refractory to a dispensing assembly under pneumatic pressure; (c) introducing water and a set modifying admixture into thedry refractory prior to dispensing the refractory castable from the dispensing assembly; and (d) spraying the hydraulic refractory castable onto a surface.
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 May 2, 1997 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2019.
- 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.