US4403891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizer for excavated surface
Assignee: Toa Grout Kogyo Co Ltd
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Filing: 1980-10-09
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Granted: 1983-09-13
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Expires: 2000-10-09
Abstract
Abstract This invention relates to an improved stabilizer for excavated surface, and more particularly to a stabilizer for excavated surface which comprises adding at least one of natural cellulose fibers, particularly pulp, defibrated waste paper stock or their mixture to an ordinary stabilizer for excavated surface containing bentonite, etc. as the main component to be used for excavating the ground according to a fluid circulation system. The stabilizer according to the present invention has a good membrane formation ability and good strengthening and reinforcement of the soil structure around the excavated surface and also has a high capacity of suspension and dispersion of the excavated muds and gravels.
Inventors
- 👤 Shinkichi Ohoka
- 👤 Sakae Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:41
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/32; E; E02; E02D; E02D19/00; E02D19/06; E02D19/12; E02D19/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
The process for stabilizing an excavated surface to provide good membrane formation ability therein and good strengthening and reinforcement of the soil structure adjacent to said surface, comprising adding to said excavated surface a stabilizer consisting of 300 parts by weight of water, 0.1 to 3.0% by weight of highly hydrated beaten natural cellulose fibers, based on the water content of the stabilizer, bentonite, a foaming agent and carboxymethylcellulose.
Claim 2
Dependent Claim
69 words
The process for stabilizing an excavated surface to provide good membrane formation ability therein and good strengthening and reinforcement of the soil structure adjacent to said surface, comprising adding to said excavated surface a stabilizer consisting of 300 parts by weight of water, 0.1 to 3.0% by weight of highly hydrated beaten natural cellulose fibers, based on the water content of the stabilizer, bentonite, a foaming agent and carboxymethylcellulose.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |