Composition suited for addition to ground excavation stabilizing liquid, stabilizing liquid composition, and ground excavation method
CA 1332669 C · Owner: Sanyo Chemical Industries, Ltd. · Inventors: Ohtsuka, Yoshiyuki; Iizuka, Yoshio; Yamamoto, Manabu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
A composition suited for addition to ground excavation stabilizing liquid is disclosed which is able to effectively prevent the deterioration of the stabilizing liquid due to seawater or the mixing therein of cement or to, prevent the putrefaction of the liquid by bacteria. A ground excavation method for using the composition is also di closed. The composition which is suited for addition to excavation stabilizing liquid comprises: (1) a mono-valency salt (A) of unsaturated carboxylic acid (co)polymer of polymerization degree 5,000 or less; and (2) a compound (B) selected from a group consisting of mono-valency aluminate group II or III, metal oxide, and salt of a higher order compound. The …
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.
Why it's free to use
- Granted October 25, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 25, 2011.
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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.