Cold weather coke oven door sealant
CA 1255854 A · Owner: Alchem Inc. · Inventors: Tousignant James N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method of sealing coke oven doors and the like which utilizes as the sealant sodium silicate the improvement which, comprises using as the sodium silicate the following composition: Soft Water 2 - 4%, Sodium Hydroxide 3 - 6% Sodium Borate 1 - 4%, X 4 - 8%, Sodium Silicate 80 - 90% wherein X is a freezing point depressant from the group consisting of alkali metal formates, inorganic phosphates water-soluble hydroxy, carboxylic acids mannitol and methanol.
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
- Granted June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.