US3721043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the improvement of the constitution of soils
Assignee: Labofina SA
•
Filing: 1971-10-27
•
Granted: 1973-03-20
•
Expires: 1991-10-27
Abstract
Abstract A process for the improvement of the constitution of soils, which comprises incorporating into said soils an aqueous emulsion of bitumen containing a non-ionic surface-active compound and an anionic surface-active compound.
Inventors
- 👤 Doorne G Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:08
CPC Classifications
C; C09; C09K; C09K17/00; C09K17/14; C09K17/18; C09K17/34; Y; Y10; Y10S; Y10S106/00; Y10S106/90; Y10S47/00; Y10S47/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
26 words
The process of claim 1 wherein said emulsion of bitumen includes a stabilizing agent in an amount no greater than 1% of the weight of bitumen.
Claim 2
Dependent Claim
13 words
The process of claim 2 wherein said stabilizing agent is an alkaline lignosulphonate.
Claim 3
Dependent Claim
28 words
The process of claim 1 wherein the said emulsion of bitumen is sprayed on the soil and is incorporated therein to a depth of 5 to 10 cm.
Claim 4
Dependent Claim
58 words
The process of claim 1 wherein the emulsion of bitumen contains from 1 to 2.5 percent by weight, calculated on the bitumen, of a condensation product prepared from alkylene oxide and a hydroxylic compound consisting of higher fatty alcohols containing 12 to 18 carbon atoms and of alkylphenol where the alkyl group contains eight or nine carbon atoms.
Claim 5
Dependent Claim
87 words
The process of claim 1 wherein the said anionic surface active compound is present in an amount of 1 to 3 percent by weight, calculated on the bitumen, and the anionic surface active compound is one selected from the group consisting of alkaline salts of the sulphonic acids obtained from higher fatty primary or secondary alcohols, alkaline salts of sulphuric acids prepared from oxyalkylated alkylphenols, alkaline salts of sulphonic acids prepared from paraffinic or olefinic hydrocarbons containing from 12 to 18 carbon atoms or from alkylaromatic hydrocarbons.
Claim 6
Dependent Claim
28 words
The process of claim 1 wherein said emulsion of bitumen contains 1 to 3 percent by weight, calculated on the bitumen, of an alkaline salt of dodecylbenzenesulphonic acid.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein said emulsion of bitumen is used in an amount varying from 0.5 to 2.5 liters per square meter of soil.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |