Composite hardened body and production method thereof as well as plate-shaped building materials using such a composite hardened body
CA 2353880 A1 · Owner: Nomura, Toshihiro · Inventors: Ogawa, Tetsuji; Matsuno, Yoshimi; Nomura, Toshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composite hardened material characterized by containing an amorphous material (2) consisting of at least two kinds of oxides and having a fibrous material (3) mixed in the amorphous material (2); and a production method thereof, the composite hardened material including one formed by hardening papermaking sludge, whereby enhancing a bending strength without compromise in processibility and productivity.
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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
- Filed December 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2021.
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Timeline
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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.