US2889276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor space corrosion inhibitor
Assignee: Pan American Petroleum Corp
•
Filing: 1955-03-30
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Granted: 1959-06-02
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Expires: 1975-03-30
Abstract
No abstract record available.
Inventors
- 👤 Jack P Barrett
- 👤 Loyd W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/02; C23F11/08; C23F11/10; C23F11/14; C23F11/141; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A METHOD OF INHIBITING CORROSION OF FERROUS METALS EXPOSED TO LIQUID WATER CONTAINING HYDROGEN SULFIDE COMPRISING ESTABLISHING IN SAID WATER A CONCENTRATION OF AT LEAST ABOUT 50 PARTS PER MILLION BY WEIGHT OF A FREE ALIPHATIC MONOAMINE CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE, SAID MONOAMINE BEING PRESENT IN AN AMOUNT SUFFICIENT TO COMBINE WITH ONLY A MINOR AMOUNT OF THE HYDROGEN SULFIDE IN THE FLUIDS TREATED BY THE MONOAMINE.
Claim 2
Independent Claim
72 words
A METHOD OF INHIBITING CORROSION OF FERROUS METALS EXPOSED TO LIQUID WATER CONTAINING HYDROGEN SULFIDE COMPRISING ESTABLISHING IN SAID WATER A CONCENTRATION OF AT LEAST ABOUT 50 PARTS PER MILLION BY WEIGHT OF A FREE ALIPHATIC MONOAMINE CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE, SAID MONOAMINE BEING PRESENT IN AN AMOUNT SUFFICIENT TO COMBINE WITH ONLY A MINOR AMOUNT OF THE HYDROGEN SULFIDE IN THE FLUIDS TREATED BY THE MONOAMINE.
Claim 3
Independent Claim
135 words
A METHOD FOR INHIBITING IN A WELL CORROSION OF FERROUS METALS EXPOSED TO WATER CONDENSING FROM VAPORS CONTAINING HYDROGEN SULFIDE AND WATER VAPORS AS WELL AS CORROSION OF FERROUS METALS EXPOSED TO LIQUID WATER CONTAINING HYDROGEN SULFIDE IN THE BOTTOM OF THE WELL COMPRISING INTRODUCING INTO SAID WELL A COMBINATION OF FROM ABOUT 10 TO 80 PERCENT BY WEIGHT OF A FREE LOW-BOILING ALIPHATIC MONOAMINE CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE AND FROM ABOUT 20 TO 90 PERCENT OF A SALT OF A HIGH-BOILING ALIPHATIC AMINE AND A CABOXYLIC ACID, SAID HIGH-BOILING AMINE CONTAINING AT LEAST 10 CARBON ATOMS PER MOLECULE AND SAID ACID CONTAINING AT LEAST 6 CARBON ATOMS PER MOLECULE, AND SAID SALT CONSISTING OF FROM 1/2 TO 2 TIMES THE AMOUNT OF HIGH-BOILING AMINE NECESSARY TO-NEUTRALIZE SAID CARBOXYLIC ACID.
Claim 4
Independent Claim
135 words
A METHOD FOR INHIBITING IN A WELL CORROSION OF FERROUS METALS EXPOSED TO WATER CONDENSING FROM VAPORS CONTAINING HYDROGEN SULFIDE AND WATER VAPORS AS WELL AS CORROSION OF FERROUS METALS EXPOSED TO LIQUID WATER CONTAINING HYDROGEN SULFIDE IN THE BOTTOM OF THE WELL COMPRISING INTRODUCING INTO SAID WELL A COMBINATION OF FROM ABOUT 10 TO 80 PERCENT BY WEIGHT OF A FREE LOW-BOILING ALIPHATIC MONOAMINE CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE AND FROM ABOUT 20 TO 90 PERCENT OF A SALT OF A HIGH-BOILING ALIPHATIC AMINE AND A CABOXYLIC ACID, SAID HIGH-BOILING AMINE CONTAINING AT LEAST 10 CARBON ATOMS PER MOLECULE AND SAID ACID CONTAINING AT LEAST 6 CARBON ATOMS PER MOLECULE, AND SAID SALT CONSISTING OF FROM 1/2 TO 2 TIMES THE AMOUNT OF HIGH-BOILING AMINE NECESSARY TO-NEUTRALIZE SAID CARBOXYLIC ACID.
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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) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |