US2721175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing corrosion of corrosive fluid to ferrous metals
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-11-05
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Granted: 1955-10-18
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Expires: 1972-11-05
Abstract
No abstract record available.
Inventors
- 👤 Melba L Lytle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:35
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/932; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF REDUCING THE CORROSIVENESS OF A CORROSIVE FLUID INCLUDING HYDROCARBON, MOISTURE, AND AN ACIDIC GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND CARBON DIOXIDE TO A CORRODIBLE FERROUS METAL EXPOSED IN A CONFINED SPACE TO SAID CORROSIVE FLUID WHICH COMPRISES INTRODUCING INTO SAID CONFINED SPACE AN AMOUNT OF UREA IN THE RANGE FROM 1 TO 10 POUNDS PER 1000 SQUARE FEET OF FERROUS METAL EXPOSED TO THE CORROSIVE FLUID AND UREASE IN A AMOUNT IN THE RANGE FROM 0.5% TO 20% BASED ON THE UREA SUFFICIENT TO INHIBIT THE CORROSIVITITY OF SAID CORROSIVE FLUID TO SAID METAL.
Claim 2
Independent Claim
101 words
A METHOD OF REDUCING THE CORROSIVENESS OF A CORROSIVE FLUID INCLUDING HYDROCARBON, MOISTURE, AND AN ACIDIC GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND CARBON DIOXIDE TO A CORRODIBLE FERROUS METAL EXPOSED IN A CONFINED SPACE TO SAID CORROSIVE FLUID WHICH COMPRISES INTRODUCING INTO SAID CONFINED SPACE AN AMOUNT OF UREA IN THE RANGE FROM 1 TO 10 POUNDS PER 1000 SQUARE FEET OF FERROUS METAL EXPOSED TO THE CORROSIVE FLUID AND UREASE IN A AMOUNT IN THE RANGE FROM 0.5% TO 20% BASED ON THE UREA SUFFICIENT TO INHIBIT THE CORROSIVITITY OF SAID CORROSIVE FLUID TO SAID METAL.
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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |