Lightweight aggregate having high resistance to water absorption and process for preparation thereof
CA 1281506 C · Owner: Shimizu Construction Co. Ltd. · Inventors: Sawaide, Minoru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lightweight aggregate which is inexpensive and excellent in both resistance to freezing and thawing and resistance to water absorption and a process for preparation of such lightweight aggregate are disclosed. In this lightweight aggregate, a gel material is filled in at least open pores in the surface layer of a lightweight porous aggregate among a multiplicity of open pores therein. The preparation process includes the steps of injecting a raw material solution for gel formation in at least open pores in the surface layer of a lightweight porous aggregate among a multiplicity of open pores therein, and allowing the material solution to gel, thereby forming a gel material in at least the …
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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 March 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2008.
- 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.