US3728419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphated mixed esters of hydroxy amines
Assignee: ChampionX LLC
•
Filing: 1970-02-03
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Granted: 1973-04-17
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Expires: 1990-02-03
Abstract
Abstract Phosphate mixed esters of hydroxy amines containing less than eight carbon atoms in hydrocarbon groups attached to the amino nitrogen and hydroxy hydrocarbons containing at least six carbon atoms in a hydrocarbon group thereof are prepared and used as scale inhibitors.
Inventors
- 👤 J Stanford
- 👤 P Vogelsang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:14
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; Y; Y10; Y10S; Y10S507/00; Y10S507/927
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
A water soluble salt derived by the partial to complete neutralization of said phosphate ester groups of a composition as claimed in claim 1.
Claim 2
Dependent Claim
17 words
A phosphate mixed ester as claimed in claim 1 wherein said hydroxyamine is a triethanolamine still residue.
Claim 3
Dependent Claim
14 words
A phosphate mixed ester as claimed in claim 1 wherein said hydroxyamine is tetrahydroxyethylethylenediamine.
Claim 4
Dependent Claim
40 words
A phosphate mixed ester as claimed in claim 1 wherein said hydroxy hydrocarbon is an oxyethylated alkyl phenol containing 4-12 carbon atoms in an alkyl group oxyethylated with about 2-20 moles of ethylene oxide per mole of said alkyl phenol.
Claim 5
Dependent Claim
32 words
A phosphate mixed ester as claimed in claim 1 wherein said hydroxy hydrocarbon is derived by oxyethylation of tridecyl alcohol with about 2-20 moles of ethylene oxide per mole of tridecyl alcohol.
Claim 6
Dependent Claim
27 words
A phosphate mixed ester as claimed in claim 1 wherein said hydroxy hydrocarbon is an oxyethylated mixture or primary alkyl alcohols containing four to 12 carbon atoms.
References Cited (Backward Citations)
US3380927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |