US3690930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting reduced iron ore by coating
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1970-07-13
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Granted: 1972-09-12
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Expires: 1990-07-13
Abstract
Abstract REDUCED METALS ARE PROTECTED FOR PROLONGED PERIODS AGAINST BACK OXIDATION AN WATER ABSORPTION BY COATING THE METAL WITH A COMPOSITION COMPRISING A BITUMINOUS MATERIAL AND FROM ABOUT 1 TO ABOUT 40 WT. PERCENT OF AN ALKALINE EARTH METAL OXIDE, HYDROXIDE OR MIXTURES THEREOF TO DEPOSIT THEREON UP TO ABOUT 0.5 WT. PERCENT OF THE BITUMINOUS MATERIAL AND THE ALKALINE EARTH METAL COMPOUND.
Inventors
- 👤 David E Mueller
- 👤 Marnell A Segura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:51
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0086; B; B01; B01J; B01J2/00; B01J2/006; B22; B22F; B22F1/00; B22F1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31717
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |