US3194692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion protection of kansite coated steel articles
Assignee: Societe Nationale des Petroles dAquitaine SA
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Filing: 1961-08-01
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Granted: 1965-07-13
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Expires: 1981-08-01
Abstract
No abstract record available.
Inventors
- 👤 Ternisien Jean Albert
- 👤 Trillat Jean Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:58
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE PROTECTION OF STEELS AND OTHER FERROUS METALS WHICH ARE EXPOSED TO THE ACTION OF A HYDROGEN SULPHIDE-CONTAINING CORROSIVE MEDIUM SO AS TO FORM A LAYER PERMEABLE TO SAID MEDIUM CONSISTING ESSENTIALLY OF CRYSTALLINE DANSITE THEREON BY CONVERTING THE PERMEABLE KANSITE COROSION LAYER INTO A CRYSTALLINE IMPERMEABLE PROTECTIVE LAYER CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF PYRRHOTINE AND PYRITE WHICH COMPRISES THE STEP OF HEATING SAID LAYER OF KANSITE TO A TEMPERATURE ABOVE 130*C. IN AN HYDROUS ATMOSPHERE SO AS TO FORM SAID IMPERMEABLE LAYER.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PROTECTION OF STEELS AND OTHER FERROUS METALS WHICH ARE EXPOSED TO THE ACTION OF A HYDROGEN SULPHIDE-CONTAINING CORROSIVE MEDIUM SO AS TO FORM A LAYER PERMEABLE TO SAID MEDIUM CONSISTING ESSENTIALLY OF CRYSTALLINE DANSITE THEREON BY CONVERTING THE PERMEABLE KANSITE COROSION LAYER INTO A CRYSTALLINE IMPERMEABLE PROTECTIVE LAYER CONSISTING ESSENTIALLY OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF PYRRHOTINE AND PYRITE WHICH COMPRISES THE STEP OF HEATING SAID LAYER OF KANSITE TO A TEMPERATURE ABOVE 130*C. IN AN HYDROUS ATMOSPHERE SO AS TO FORM SAID IMPERMEABLE LAYER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |