Methods of making asbestos-free, glass fibre reinforced, cement composite products and the products of such methods
CA 1159634 A · Owner: Tegral Technology Limited · Inventors: Bunt, William H.; Thatcher, Kenneth C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for making a cement composite product such as a flat or profiled sheet, or a pipe containing glass, fibre as reinforcement instead of the traditional asbestos wherein a cement and water slurry of flowable consistency is made with high shear agitation, the glass fibre is mixed with the slurry in a static mixing apparatus (i.e. having no moving parts) by bringing together flows of the slurry and of the glass fibre and then altering the path of the conjoined flow, and the glass fibre-containing mixture is immediately subjected to the conventional deposition on a water-permeable web, formation of a profile if desired drainage of the water, from the slurry through the web …
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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 January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
- 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.