Fabric for forming fiber cement articles
CA 2273746 A1 · Owner: Breit, Oswald · Inventors: Gstrein, Hippolit; Breit, Oswald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fiber cement felts of the present invention include: a top fabric layer that includes fine machine direction yarns and fine cross machine direction yarns interwoven with the fine machine direction yarns; a bottom fabric layer underlying the, top fabric layer that includes coarse machine direction yarns and coarse cross machine, direction yarns interwoven with the coarse machine direction yarns; and a batt layer, attached to and overlying the top fabric layer. Preferably the top fabric , layer is heat, bonded to the bottom fabric layer. It is also preferred that the fiber cement felt of the, present invention include a second butt layer that underlies the bottom fabric layer. In, this …
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 June 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2021.
- 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.