US3158465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical material and process for treating iron therewith
Assignee: Kerchner Marshall and Co
•
Filing: 1961-09-07
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Granted: 1964-11-24
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Expires: 1981-09-07
Abstract
No abstract record available.
Inventors
- 👤 William A Brown
- 👤 John F Drenning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
C; C21; C21C; C21C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A BRIQUETTE THAT IS USEFUL FOR TREATING MOLTEN IRON BY ADDITION THERETO, COMPRISING A MAJOR PORTION OF SILICON CARBIDE AND UP TO 15% BY WEIGHT OF AN ALKALINE MODIFYING AGENT CONTAINING A HYGROSCOPIC MATERIAL, UP TO 40% BY WEIGHT OF THE MODIFYING AGENT COMPRISING SODIUM CHLOWEIGHT OF THE MODIFYING AGENT COMPRISING SODIUM CHLORIDE, THE LOWER LIMIT OF THE MODIFYING AGENT IN THE BRIQUETTE BEING AN AMOUNT EFFECTIVE TO ENHANCE THE ACTION OF THE SILICON CARBIDE IN THE MOLTEN IRON, AND LOWER LIMIT OF SODIUM CHLORIDE IN THE MODIFYING AGENT BEING AN AMOUNT EFFECTIVE TO COUNTERACT THE HYGROSCOPIC CHARACTERISTICS OF SAID MATERIAL.
Claim 2
Dependent Claim
101 words
A BRIQUETTE THAT IS USEFUL FOR TREATING MOLTEN IRON BY ADDITION THERETO, COMPRISING A MAJOR PORTION OF SILICON CARBIDE AND UP TO 15% BY WEIGHT OF AN ALKALINE MODIFYING AGENT CONTAINING A HYGROSCOPIC MATERIAL, UP TO 40% BY WEIGHT OF THE MODIFYING AGENT COMPRISING SODIUM CHLOWEIGHT OF THE MODIFYING AGENT COMPRISING SODIUM CHLORIDE, THE LOWER LIMIT OF THE MODIFYING AGENT IN THE BRIQUETTE BEING AN AMOUNT EFFECTIVE TO ENHANCE THE ACTION OF THE SILICON CARBIDE IN THE MOLTEN IRON, AND LOWER LIMIT OF SODIUM CHLORIDE IN THE MODIFYING AGENT BEING AN AMOUNT EFFECTIVE TO COUNTERACT THE HYGROSCOPIC CHARACTERISTICS OF SAID MATERIAL.
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |