Scored fiberboard having improved moldability
CA 1331683 C · Owner: Teodorson, Egon R.H. Jr. · Inventors: Clarke, John T.; Teodorson, Egon R.H. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plurality of intermittent incisions are made in a surface region of a fiberboard to sever fibers without removing them from the surface region. The resultant fiberboard may be molded under heat and pressure to a three dimensional hardboard with high fidelity to the mold and without causing stretch marks tears or fractures. The fiberboard may be a dry consolidated mass of wet-felted cellulosic fibers. The invention is particularly valuable in the molding of boards made from redwood fibers and other long fibers. The intermittent incisions may be made along one or more lines parallel to or perpendicular to the longitudinal edge of the fiberboard but a grid of incisions along intersecting …
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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 August 30, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 30, 2011.
- 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.