US3182018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting corrosion in oil wells
Assignee: California Research LLC
•
Filing: 1962-05-16
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Granted: 1965-05-04
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Expires: 1982-05-16
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Chittum
- 👤 Frederic W Schremp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:53
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/187; C09; C09K; C09K8/00; C09K8/54; E; E21; E21B; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE METHOD OF INHIBITING CORROSION OF FERROUS METAL SURFACES IN CONTACT WITH AN OIL FIELD BRINE CONTAINING AT LEAST 5 P.P.M. OF FERROUS ION WHICH COMPRISES INCORPORATING IN SAID BRINE A WATER-SOLUBLE FERROCYANIDE IN AN AMOUNT SUFFICIENT TO PRODUCE IN SOLUTION IN SAID BRINE A CONCENTRATION OF 5 TO 140 P.P.M. OF BORATE ION, THE IMPROVEMENT FOR INHIBITING SAID CORROSION WHICH COMPRISES ALSO INCORPORATING IN SAID BRINE ANTIMONY TRISULFIDE IN AN AMOUNT SUFFICIENT TO REDUCE SUBSTANTIALLY THE TENDENCY OF FERROCYANIDE SCALE TO BE PRODUCED, AND SAID AMOUNT BEING FROM 0.1 TO 50 P.P.M.
Claim 2
Dependent Claim
94 words
IN THE METHOD OF INHIBITING CORROSION OF FERROUS METAL SURFACES IN CONTACT WITH AN OIL FIELD BRINE CONTAINING AT LEAST 5 P.P.M. OF FERROUS ION WHICH COMPRISES INCORPORATING IN SAID BRINE A WATER-SOLUBLE FERROCYANIDE IN AN AMOUNT SUFFICIENT TO PRODUCE IN SOLUTION IN SAID BRINE A CONCENTRATION OF 5 TO 140 P.P.M. OF BORATE ION, THE IMPROVEMENT FOR INHIBITING SAID CORROSION WHICH COMPRISES ALSO INCORPORATING IN SAID BRINE ANTIMONY TRISULFIDE IN AN AMOUNT SUFFICIENT TO REDUCE SUBSTANTIALLY THE TENDENCY OF FERROCYANIDE SCALE TO BE PRODUCED, AND SAID AMOUNT BEING FROM 0.1 TO 50 P.P.M.
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) | 1968-05-03 | 1968-11-02 | 1969-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-03 | 1972-11-02 | 1973-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-03 | 1976-11-02 | 1977-05-04 | $7700.00 | Window Closed / Lapsed |