Patent US2829959A successfully refreshed from Google Patents.
US2829959A
Expired / Lapsed
US
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Process for producing slag wool
Assignee: Dortmund Hoerder Huettenunion AG
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Filing: 1956-08-02
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Granted: 1958-04-08
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Knuppel Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:59
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C21B2400/00; C21B2400/02; C21B2400/022; Y; Y02; Y02W; Y02W30/00; Y02W30/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A PROCESS FOR PRODUCING SLAG WOOL BY BLOWING MOLTEN BLAST FURNACE SLAG, THAT METHOD WHICH INCLUDES THE STEPS OF CHARGING THE MOLTEN SLAG FROM THE BLAST FURNACE INTO A HEATABLE INTERMEDIATE VESSEL, REDUCING THE SLAG TO AN IRON CONTENT OF AT LEAST 0.4%, ADDING UP TO 5% OF SILICIC ACID TO SAID SLAG AND THEREAFTER HEATING SAID SLAG IN SAID INTERMEDIATE VESSEL UNTIL ALL THE CONSTITUENTS OF SAID SLAG HAVE BEEN COMPLETELY MELTED DOWN INCLUDING THOSE CONSTITUENTS WHICH ARE NOT MELTED WHEN SAID SLAG IS CHARGED INTO SAID INTERMEDIATE VESSEL.
Claim 2
Dependent Claim
91 words
IN A PROCESS FOR PRODUCING SLAG WOOL BY BLOWING MOLTEN BLAST FURNACE SLAG, THAT METHOD WHICH INCLUDES THE STEPS OF CHARGING THE MOLTEN SLAG FROM THE BLAST FURNACE INTO A HEATABLE INTERMEDIATE VESSEL, REDUCING THE SLAG TO AN IRON CONTENT OF AT LEAST 0.4%, ADDING UP TO 5% OF SILICIC ACID TO SAID SLAG AND THEREAFTER HEATING SAID SLAG IN SAID INTERMEDIATE VESSEL UNTIL ALL THE CONSTITUENTS OF SAID SLAG HAVE BEEN COMPLETELY MELTED DOWN INCLUDING THOSE CONSTITUENTS WHICH ARE NOT MELTED WHEN SAID SLAG IS CHARGED INTO SAID INTERMEDIATE VESSEL.
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) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |