US3714762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrofilter insulator without damaging dust deposits
Assignee: Fried Krupp AG
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Filing: 1970-08-28
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Granted: 1973-02-06
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Expires: 1990-08-28
Abstract
Abstract THOSE FROM CARBON-MONOXIDE-CONTAINING CONVERTER WASTE GASES, IN A REDUCING ATMOSPHERE. HOT OXIDIZING GAS IS PASSED OVER ELECTROFILTER INSULATORS TO REDUCE THE AMOUNT OF FEO DEPOSITED THEREON AND TO CONVERT ANY SUCH FEO TO FE2O3. THE ELETROFILER IS ONE PRIMARILY USED TO REMOVE PYROPHORIC DUSTS, PARTICULARLY
Inventors
- 👤 F Fillies
- 👤 G Urban
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66; B03C3/70
Claims Analysis
Total Claims: 0
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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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |