US2920040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for inhibiting corrosion of ferrous metals by oil well fluid
Assignee: Sunoco Inc
•
Filing: 1956-12-05
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Granted: 1960-01-05
•
Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel E Jolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:41
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/143; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
PROCESS FOR INHIBITING CORROSION OF FERROUS METALS BY OIL WELL FLUID WHICH COMPRISES ADDING TO OIL WELL FLUID COMPRISING AN H2S-CONTAINING MIXTURE OF CRUDE PETROLEUM AND BRINE WHICH CONTACTS FERROUS METALS, A SALT OF (1) A POLYAMINE HAVING THE FORMULA
Claim 2
Dependent Claim
40 words
PROCESS FOR INHIBITING CORROSION OF FERROUS METALS BY OIL WELL FLUID WHICH COMPRISES ADDING TO OIL WELL FLUID COMPRISING AN H2S-CONTAINING MIXTURE OF CRUDE PETROLEUM AND BRINE WHICH CONTACTS FERROUS METALS, A SALT OF (1) A POLYAMINE HAVING THE FORMULA
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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) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |