Patent US2460347A successfully refreshed from Google Patents.
US2460347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of furnaces from slag
Assignee: Individual
•
Filing: 1945-06-23
•
Granted: 1949-02-01
•
Expires: 1965-06-23
Abstract
No abstract record available.
Inventors
- 👤 William E Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US984254A
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US1583918A
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US1602105A
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Cited
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Cited
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Cited
FR798492A
Cited
US2077796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-01 | 1952-08-02 | 1953-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-01 | 1956-08-02 | 1957-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-01 | 1960-08-02 | 1961-02-01 | $7700.00 | Window Closed / Lapsed |