US2801697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and means for introducing corrosion inhibitors into oil wells
Assignee: CREST RES LAB Inc
•
Filing: 1953-08-03
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Granted: 1957-08-06
•
Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Gilson H Rohrback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:25
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S166/00; Y10S166/902; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD OF INHIBITING CORROSION OF FEROUS MATAL TUBING SURFACES IN AN OIL WELL BY THE PRODUCTION FLUIDS OF THE WELL, COMPRISING THE STEPS OF PRODUCING A SOLUTION CONTAINING INHIBITOR METAL IONS CAPABLE OF CHEMICAL REDUCTION AT SAID SURFACES TO DESPIT AN INHIBITOR FILM THERON, WHEREIN SAOD SOLUTION IS PRODUCED BY PASSING ELECTRIC CURRENT THROUGH AN ELECTROLYTE BETWEEN AN ANODECOMPRISING SAID INHIBITOR METAL AND A CATHODE, AND COM-
Claim 2
Independent Claim
68 words
THE METHOD OF INHIBITING CORROSION OF FEROUS MATAL TUBING SURFACES IN AN OIL WELL BY THE PRODUCTION FLUIDS OF THE WELL, COMPRISING THE STEPS OF PRODUCING A SOLUTION CONTAINING INHIBITOR METAL IONS CAPABLE OF CHEMICAL REDUCTION AT SAID SURFACES TO DESPIT AN INHIBITOR FILM THERON, WHEREIN SAOD SOLUTION IS PRODUCED BY PASSING ELECTRIC CURRENT THROUGH AN ELECTROLYTE BETWEEN AN ANODECOMPRISING SAID INHIBITOR METAL AND A CATHODE, AND COM-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |