US3271306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing the formation of insoluble iron compounds
Assignee: Monsanto Co
•
Filing: 1963-11-06
•
Granted: 1966-09-06
•
Expires: 1983-11-06
Abstract
No abstract record available.
Inventors
- 👤 Enrico G Capriati
- 👤 David T Oakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:12
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/14; C09; C09K; C09K8/00; C09K8/60; C09K8/607; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
THE METHOD OF PREVENTING THE FORMATION OF WATERINSOLUBLE FE(OH)3 IN AQUEOUS SYSTEMS IN THE PRESENCE OF IRON CAPABLE OF FORMING SAID FE(OH)3 WHICH COMPRISES ADDING TO SAID AQUEOUS SYSTEM 25 TO 1000 P.P.M. OF A HALOALKYL PHOSPHONIC ACID OF NO GREATER THAN 6 CARBON ATOMS.
Claim 2
Independent Claim
45 words
THE METHOD OF PREVENTING THE FORMATION OF WATERINSOLUBLE FE(OH)3 IN AQUEOUS SYSTEMS IN THE PRESENCE OF IRON CAPABLE OF FORMING SAID FE(OH)3 WHICH COMPRISES ADDING TO SAID AQUEOUS SYSTEM 25 TO 1000 P.P.M. OF A HALOALKYL PHOSPHONIC ACID OF NO GREATER THAN 6 CARBON ATOMS.
Claim 3
Independent Claim
48 words
THE METHOD OF PREVENTING THE FORMATION OF WATERINSOLUBLE FE(OH)3 IN SUBTERRANEAN PETROLEUM-BEARING FORMATIONS DURING THE SECONDARY RECOVERY OF PETROLEUM BY WATER FLOODING, SAID METHOD COMPRISING ADDING 25 TO 1000 P.P.M. OF A HALOALKYL PHOSPHONIC ACID CONTAINING NO GREATER THAN 6 CARBON ATOMS TO THE SECONDARY RECOVERY INJECTION WATER.
Claim 4
Independent Claim
48 words
THE METHOD OF PREVENTING THE FORMATION OF WATERINSOLUBLE FE(OH)3 IN SUBTERRANEAN PETROLEUM-BEARING FORMATIONS DURING THE SECONDARY RECOVERY OF PETROLEUM BY WATER FLOODING, SAID METHOD COMPRISING ADDING 25 TO 1000 P.P.M. OF A HALOALKYL PHOSPHONIC ACID CONTAINING NO GREATER THAN 6 CARBON ATOMS TO THE SECONDARY RECOVERY INJECTION WATER.
References Cited (Backward Citations)
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US2874184A
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US3021279A
Cited
US3177144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |