Patent US3477529A successfully refreshed from Google Patents.
US3477529A
Expired / Lapsed
US
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Simplified automatic charging system for blast furnaces
Assignee: Australian Iron and Steel Pty Ltd
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Filing: 1967-07-05
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Granted: 1969-11-11
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Expires: 1987-07-05
Abstract
No abstract record available.
Inventors
- 👤 Patrick Marion Burn
- 👤 Ronald Arthur Nevison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:36
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3035648A
Cited
US3063635A
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US3137356A
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US3254728A
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US3291233A
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US3362490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |