Patent US3146208A successfully refreshed from Google Patents.
US3146208A
Expired / Lapsed
US
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Corrosion inhibition
Assignee: Monsanto Co
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Filing: 1960-12-29
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Granted: 1964-08-25
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Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Fisher Arthur Orman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:43
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
50 words
A METHOD OF INHIBITING THE NATURAL TENDENCY OF A NONOXIDIZING AQUEOUS ACIDIC COMPOSITION TO CORRODE NONGRAPHITIC METAL, WHICH METHOD COMPRISES DISSOLVING IN SAID ACID BETWEEN ABOUT 0.002 AND ABOUT 4 WEIGHT PERCENT OF AN AMINE SALT OF A DIALKYLPHOSPHOROTHIOIC ACID, SAID SALT BEING ONE OF AN AMINE HAVING THE STRUCTURE:
Claim 2
Independent Claim
50 words
A METHOD OF INHIBITING THE NATURAL TENDENCY OF A NONOXIDIZING AQUEOUS ACIDIC COMPOSITION TO CORRODE NONGRAPHITIC METAL, WHICH METHOD COMPRISES DISSOLVING IN SAID ACID BETWEEN ABOUT 0.002 AND ABOUT 4 WEIGHT PERCENT OF AN AMINE SALT OF A DIALKYLPHOSPHOROTHIOIC ACID, SAID SALT BEING ONE OF AN AMINE HAVING THE STRUCTURE:
Claim 3
Independent Claim
74 words
A METHOD OF INHIBITING THE NATURAL TENDENCY OF A MONOXIDIZING AQUEOUS ACIDIC COMPOSITION TO CORRODE NONGRAPHITIC METAL, WHICH METHOD COMPRISES DISSOLVING IN SAID ACID BETWEEN ABOUT 0.001 AND ABOUT 4 WEIGHT PERCENT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF DIALKYLPHOSPHOROTHIOIC ACIDS AND SALTS THEREOF, AND BETWEEN ABOUT 0.0005 AND ABOUT 1 WEIGHT PERCENT OF AN INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF IODIDES AND BROMIDES, SAID DIALKYLPHOSPHOROTHIOIC ACIDS HAVING THE STRUCTURE:
Claim 4
Independent Claim
74 words
A METHOD OF INHIBITING THE NATURAL TENDENCY OF A MONOXIDIZING AQUEOUS ACIDIC COMPOSITION TO CORRODE NONGRAPHITIC METAL, WHICH METHOD COMPRISES DISSOLVING IN SAID ACID BETWEEN ABOUT 0.001 AND ABOUT 4 WEIGHT PERCENT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF DIALKYLPHOSPHOROTHIOIC ACIDS AND SALTS THEREOF, AND BETWEEN ABOUT 0.0005 AND ABOUT 1 WEIGHT PERCENT OF AN INORGANIC SALT SELECTED FROM THE GROUP CONSISTING OF IODIDES AND BROMIDES, SAID DIALKYLPHOSPHOROTHIOIC ACIDS HAVING THE STRUCTURE:
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |