Patent US3665720A successfully refreshed from Google Patents.
US3665720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing sand foundations under building works submerged in water
Assignee: Christiani & Nielsen As
•
Filing: 1970-05-08
•
Granted: 1972-05-30
•
Expires: 1990-05-08
Abstract
Abstract A method of stabilizing sand foundations under building works submerged in water including pumping in sand to which a small percentage of hydraulic binder is added under the building work, utilizing a grain-size distribution of the hydraulic binder adjusted to the grain-size distribution of the sand to avoid separation of the binder from the sand, wherein the hydraulic binder, by hydration, cements the sand grains into a strong coherent conglomerate which will remain unaffected by earthquakes.
Inventors
- 👤 Kaj Havno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:26
CPC Classifications
E; E02; E02D; E02D27/00; E02D27/32; E02D27/34; E02D3/00; E02D3/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
29 words
The method according to claim 1, characterized by the fact, that the added hydraulic binder is a coarse-grained cement product having substantially the same grain-size distribution as the sand.
Claim 2
Dependent Claim
23 words
A method in accordance with claim 1 wherein said small percentage of hydraulic binder added to the sand comprises 2-5 percent by weight.
Claim 3
Dependent Claim
23 words
A method in accordance with claim 1 wherein said grain-size distribution of said binder and said sand is as shown in the Figure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |