Patent US2635698A successfully refreshed from Google Patents.
US2635698A
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Method for inhibiting corrosion
Assignee: California Research LLC
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Filing: 1951-03-16
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Granted: 1953-04-21
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Expires: 1971-03-16
Abstract
No abstract record available.
Inventors
- 👤 Gilson H Rohrback
- 👤 Dwite M Mccloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:18
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/184; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
106 words
THE METHOD OF INHIBITING THE CORROSION OF FERROUS METAL TUBING IN A PRODUCING OIL WELL DELIVERING A PRODUCTION STREAM COMPRISING CRUDE OIL, BRINE, AND CARBON DIOXIDE GAS AND CHARACTERIZED BY A PH ABOVE 3 THROUGH SAID TUBING WHICH COMPRISES INTRODUCING A SOLUTION OF ARSENOUS OXIDE IN AQUEOUS ALKALI INTO THE WELL BOTTOM AND PRODUCING THE WELL, THE AMOUNT OF THE SOLUTION INTRODUCED DURING THE FIRST 100 TO 600 HOURS OF TREATMENT BEING EQUIVALENT TO THAT REQUIRED TO GIVE THE PRODUCED WATER AN ARSENIC CONTENT IN THE RANGE 10 TO 50 P.P.M. CALCULATED AS ARSENOUS OXIDE AND THE AMOUNT INTRODUCED THEREAFTER BEING A LESSER AMOUNT EQUIVALENT TO
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |