Patent US2981162A successfully refreshed from Google Patents.
US2981162A
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Soil stabilization with an organic derivative of ammonia and an acrylate polymer
Assignee: IOWA STATE COLLEGE RES FOUND
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Filing: 1958-04-23
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Granted: 1961-04-25
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Expires: 1978-04-23
Abstract
No abstract record available.
Inventors
- 👤 Donald T Davidson
- 👤 Robert L Nicholls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:39
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/20; C09K17/22; Y; Y10; Y10S; Y10S260/00; Y10S260/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
THE METHOD OF STABILIZING SOILS CONTAINING CLAYS, COMPRISING APPLYING TO SAID SOILS IN AN AQUEOUS CARRIER A QUATERNARY AMMONIUM SALT HAVING SOIL STABILIZATION PROPERTIES, SAID QUATERNARY AMMONIUM SALT CONTAINING AT LEAST ONE ALIPHATIC GROUP HAVING FROM AT LEAST 8 TO ABOUT 18 CARBON ATOMS, SAID QUATERNARY BEING BROUGHT INTO CONTACT WITH THE CLAY PARTICLES IN SAID SOLID TO COAT THE SURFACES THEREOF AND BEING APPLIED IN THE PROPORTIONS OF FROM ABOUT .05 TO 2 PARTS OF SAID QUATERNARY PER 100 PARTS OF SOIL BEING COATED, ALSO APPLYING TO SAID SOIL IN AN AQUEOUS CARRIER A WATER-SOLUBLE ACRYLATE POLYMER HAVING AN AVERAGE MOLECULAR WEIGHT WITHIN THE RANGE FROM ABOUT 50,000 TO 300,000, SAID POLYMER BEING MADE UP ESSENTIALLY OF UNITS REPRESENTED BY THE STRUCTURAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |