Patent US2546570A successfully refreshed from Google Patents.
Patent US2550997A successfully refreshed from Google Patents.
US2550997A
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Inhibition of corrosion
Assignee: Shell Development Co
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Filing: 1949-02-14
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Granted: 1951-05-01
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Expires: 1969-02-14
Abstract
No abstract record available.
Inventors
- 👤 Gail D Harden
- 👤 William J Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
AN IMPROVED CORROSION-INHIBITING PROCESS FOR CLEANING RESIDUAL AMOUNTS OF PETROLEUM PRODUCTS FROM FERRUGINOUS METAL CARGO COMPARTMENTS OF OIL TANKERS AT SEA WHICH COMPRISES SPRAYING THE INNER WALLS OF SAID COMPARTMENTS WITH AN ALKALINE FRESH WATER SODIUM NITRITE SOLUTION AT AMBIENT TEMPERATURE, THEREBY FORMING A MIXTURE OF SAID SOLUTION AND SAID PRODUCTS, WITHDRAWING THE MIXTURE FROM SAID COMPARTMENT, ALLOWING SAID MIXTURE TO SETTLE INTO TWO PHASES, SEPARATING THE PRODUCTS FROM THE SOLUTION, AND RETURNING SAID SOLUTION TO THE SPRAYING OPERATION.
Claim 2
Dependent Claim
79 words
AN IMPROVED CORROSION-INHIBITING PROCESS FOR CLEANING RESIDUAL AMOUNTS OF PETROLEUM PRODUCTS FROM FERRUGINOUS METAL CARGO COMPARTMENTS OF OIL TANKERS AT SEA WHICH COMPRISES SPRAYING THE INNER WALLS OF SAID COMPARTMENTS WITH AN ALKALINE FRESH WATER SODIUM NITRITE SOLUTION AT AMBIENT TEMPERATURE, THEREBY FORMING A MIXTURE OF SAID SOLUTION AND SAID PRODUCTS, WITHDRAWING THE MIXTURE FROM SAID COMPARTMENT, ALLOWING SAID MIXTURE TO SETTLE INTO TWO PHASES, SEPARATING THE PRODUCTS FROM THE SOLUTION, AND RETURNING SAID SOLUTION TO THE SPRAYING OPERATION.
References Cited (Backward Citations)
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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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |