US2637286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained replaceable panels for open hearth furnaces
Assignee: General Refractories Co
•
Filing: 1947-11-12
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Granted: 1953-05-05
•
Expires: 1967-11-12
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:54
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27B; F27B3/00; F27B3/10; F27B3/12; F27D1/16; F27D2001/0046; F27D2001/005; F27D2001/1605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1353830A
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US1415630A
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US1611819A
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US1868352A
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US1864333A
Cited
US2119426A
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US2219363A
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US2294788A
Cited
US2389622A
Cited
US2402152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |