Patent US2556387A successfully refreshed from Google Patents.
US2556387A
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Method of inhibiting the corrosion of ferrous equipment used in the regeneration andboiling of alkali metal solutions
Assignee: Pure Oil Co
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Filing: 1948-04-28
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Granted: 1951-06-12
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Expires: 1968-04-28
Abstract
No abstract record available.
Inventors
- 👤 George W Ayers
- 👤 Erskine E Harton
- 👤 Louis R Mazurk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:56
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE METHOD OF PROTECTING FERROUS VESSELS AGAINST CORROSION DURING THE BOILING THEREIN OF CAUSTIC ALKALI SOLUTIONS, CONTAINING ABOUT 5 TO 50% OF CAUSTIC ALKALI WHICH HAVE BEEN USED TO EXTRACT SULFUR COMPOUNDS FROM HYDROCARBONS, IN ORDER TO REGENERATE SAID SOLUTIONS, COMPRISING INCORPORATING IN THE SOLUTION, AS AN INHIBITING MATERIAL, AN ALKALI METAL NITRATE IN AMOUNT SUFFICIENT TO EFFECT A MATERIAL REDUCTION IN THE CORROSIVENESS OF THE SOLUTION.
Claim 2
Independent Claim
67 words
THE METHOD OF PROTECTING FERROUS VESSELS AGAINST CORROSION DURING THE BOILING THEREIN OF CAUSTIC ALKALI SOLUTIONS, CONTAINING ABOUT 5 TO 50% OF CAUSTIC ALKALI WHICH HAVE BEEN USED TO EXTRACT SULFUR COMPOUNDS FROM HYDROCARBONS, IN ORDER TO REGENERATE SAID SOLUTIONS, COMPRISING INCORPORATING IN THE SOLUTION, AS AN INHIBITING MATERIAL, AN ALKALI METAL NITRATE IN AMOUNT SUFFICIENT TO EFFECT A MATERIAL REDUCTION IN THE CORROSIVENESS OF THE SOLUTION.
References Cited (Backward Citations)
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Cited
US1919308A
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US1943744A
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US1876837A
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US1772618A
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US2015038A
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US2153952A
Cited
US2207566A
Cited
US2297621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |