Patent US2550434A successfully refreshed from Google Patents.
US2550434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suppression of corrosion
Assignee: Standard Oil Development Co
•
Filing: 1945-07-02
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Granted: 1951-04-24
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Expires: 1965-07-02
Abstract
No abstract record available.
Inventors
- 👤 Prentiss S Viles
- 👤 Jr David C Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:47
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF INHIBITING THE CORROSIVENESS OF A CORROSIVE SOLUTION CONSISTING OF AN ALKALI METAL HYDROXIDE AND WATER IN CONTACT WITH A CORRODIBLE COPPER SURFACE WHICH CONSISTS IN THE STEP OF MAINTAINING IN SAID CORROSIVE SOLUTION WHILE IN CONTACT WITH SAID CORRODIBLE COPPER SURFACE AN AMOUNT OF COMBINED HYDROGEN SULFIDE IN AN AMOUNT AT LEAST 0.1 MOLE PER MOLE OF ALKALI METAL HYDROXIDE AND LESS THAN REQUIRED TO NEUTRALIZED ALL THE ALKALI METAL HYDROXIDE.
Claim 2
Independent Claim
74 words
A METHOD OF INHIBITING THE CORROSIVENESS OF A CORROSIVE SOLUTION CONSISTING OF AN ALKALI METAL HYDROXIDE AND WATER IN CONTACT WITH A CORRODIBLE COPPER SURFACE WHICH CONSISTS IN THE STEP OF MAINTAINING IN SAID CORROSIVE SOLUTION WHILE IN CONTACT WITH SAID CORRODIBLE COPPER SURFACE AN AMOUNT OF COMBINED HYDROGEN SULFIDE IN AN AMOUNT AT LEAST 0.1 MOLE PER MOLE OF ALKALI METAL HYDROXIDE AND LESS THAN REQUIRED TO NEUTRALIZED ALL THE ALKALI METAL HYDROXIDE.
References Cited (Backward Citations)
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US2054282A
Cited
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Cited
US2238651A
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US2385175A
Cited
US2426087A
Cited
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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) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |