US2899330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil stabilization
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:15
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/40; C09K17/48; Y; Y10; Y10S; Y10S106/00; Y10S106/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD OF EFFECTING THE STABILIZATION OF CLAYSOIL CONTAINING FROM ABOUT 10 PERCENT TO ABOUT 70 PERCENT OF CLAY AND HAVING A PLASTIC INDEX OF GREATER THAN ABOUT 15 COMPRISING THE ADDITION THERTO OF FROM ABOUT 1 TO ABOUT 5 WEIGHT PERCENT OF PHOSPHORIC ACID, CALCULATED AS 100% H3PO4, AND FROM ABOUT 0.1 TO ABOUT 2 WEIGHT PERCENT OF AN ALKENYL POLYAMINE, DEFINED BY THE FORMULA R-NH(C2H4NH)NH, WHEREIN R IS A HIGHER ALKENYL RADICAL CONTAINING FROM 8 TO 16 CARBON ATOMS AND N IS AN INTEGER FROM 1 TO 4, EACH BASED ON THE DRY WEIGHT OF SAID SOIL, EFFECTING A SUBSTANTIALLY UNIFORM DISTRIBUTION OF THE PHOSPHORIC ACID AN ALKENYL POLYAMINE IN THE SAID SOIL AND THEREAFTER COMPACTING THE TREATED SOIL TO PROVIDE A STABILIZED SOIL CHARACTERIZED BY A SUBSTANTIALLY IMPROVED UNCONFINED COMPRESSEVE STRENGTH OVER THE UNTREATED SOIL AFTER IMMERSION IN WATER FOR AT LEAST TWO DAYS.
Claim 2
Independent Claim
147 words
A METHOD OF EFFECTING THE STABILIZATION OF CLAYSOIL CONTAINING FROM ABOUT 10 PERCENT TO ABOUT 70 PERCENT OF CLAY AND HAVING A PLASTIC INDEX OF GREATER THAN ABOUT 15 COMPRISING THE ADDITION THERTO OF FROM ABOUT 1 TO ABOUT 5 WEIGHT PERCENT OF PHOSPHORIC ACID, CALCULATED AS 100% H3PO4, AND FROM ABOUT 0.1 TO ABOUT 2 WEIGHT PERCENT OF AN ALKENYL POLYAMINE, DEFINED BY THE FORMULA R-NH(C2H4NH)NH, WHEREIN R IS A HIGHER ALKENYL RADICAL CONTAINING FROM 8 TO 16 CARBON ATOMS AND N IS AN INTEGER FROM 1 TO 4, EACH BASED ON THE DRY WEIGHT OF SAID SOIL, EFFECTING A SUBSTANTIALLY UNIFORM DISTRIBUTION OF THE PHOSPHORIC ACID AN ALKENYL POLYAMINE IN THE SAID SOIL AND THEREAFTER COMPACTING THE TREATED SOIL TO PROVIDE A STABILIZED SOIL CHARACTERIZED BY A SUBSTANTIALLY IMPROVED UNCONFINED COMPRESSEVE STRENGTH OVER THE UNTREATED SOIL AFTER IMMERSION IN WATER FOR AT LEAST TWO DAYS.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |