US2898706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improving the physical properties of clay soils by treating with alkenyl polyamines
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-04-08
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Granted: 1959-08-11
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Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 John W Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:43
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/36; Y; Y10; Y10S; Y10S106/00; Y10S106/90; Y10S260/00; Y10S260/14; Y10S71/00; Y10S71/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD FOR THE IMPROVEMENT OF THE SOIL STRUCTURE OF CLAY-CONTAINING SOILS COMPRISING THE DISTRIBUTION IN A CLAY SOIL IN INTIMATE ADMIXTURE THEREWITH OF FROM ABOUT 0.1 TO ABOUT 2 WEIGHT PERCENT, BASED ON THE DRY WEIGHT OF THE SOIL OF AN ALKENYL POLYAMMINE, 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.
Claim 2
Independent Claim
72 words
A METHOD FOR THE IMPROVEMENT OF THE SOIL STRUCTURE OF CLAY-CONTAINING SOILS COMPRISING THE DISTRIBUTION IN A CLAY SOIL IN INTIMATE ADMIXTURE THEREWITH OF FROM ABOUT 0.1 TO ABOUT 2 WEIGHT PERCENT, BASED ON THE DRY WEIGHT OF THE SOIL OF AN ALKENYL POLYAMMINE, 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.
References Cited (Backward Citations)
US2172822A
Cited
US2267205A
Cited
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 |