US2856358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting corrosion
Assignee: ConocoPhillips Co
•
Filing: 1955-05-02
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Granted: 1958-10-14
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Expires: 1975-05-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Olen L Riggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:26
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/163; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF INHIBITING CORROSION OF FERROUS METALS IN CONTACT WITH CORROSIVE FLUIDS WHICH COMPRISES THE ADDITION TO SAID CORROSIVE FLUIDS OF AN AMOUNT WITHIN THE RANGE OF 2 TO 500 PARTS PER MILLION OF THE CORROSIVE FLUIDS CONTACTED ON OIL-SOLUBLE SALT, SAID SALT BEING THE REACTION PRODUCT OF 1-HYDROXY-ALKYL-2-LONG CHAIN ALKYL IMIDAZOLINE AND AN ALKARYL SULFONIC ACID WHEREIN THE ALKARYL SULFONIC ACID HAS A MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 400 TO 550.
Claim 2
Independent Claim
75 words
THE METHOD OF INHIBITING CORROSION OF FERROUS METALS IN CONTACT WITH CORROSIVE FLUIDS WHICH COMPRISES THE ADDITION TO SAID CORROSIVE FLUIDS OF AN AMOUNT WITHIN THE RANGE OF 2 TO 500 PARTS PER MILLION OF THE CORROSIVE FLUIDS CONTACTED ON OIL-SOLUBLE SALT, SAID SALT BEING THE REACTION PRODUCT OF 1-HYDROXY-ALKYL-2-LONG CHAIN ALKYL IMIDAZOLINE AND AN ALKARYL SULFONIC ACID WHEREIN THE ALKARYL SULFONIC ACID HAS A MOLECULAR WEIGHT WITHIN THE RANGE OF ABOUT 400 TO 550.
References Cited (Backward Citations)
US2466517A
Cited
US2468163A
Cited
US2493483A
Cited
US2583399A
Cited
US2671757A
Cited
US2785127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |