Patent US2534832A successfully refreshed from Google Patents.
US2534832A
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US
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Fabricated refractory metal firebox
Assignee: Individual
•
Filing: 1947-09-20
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Granted: 1950-12-19
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Expires: 1967-09-20
Abstract
No abstract record available.
Inventors
- 👤 Carl E Schinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:14
CPC Classifications
F; F23; F23C; F23C3/00; F24; F24H; F24H9/00; F24H9/18; F24H9/1854; F24H9/1877; F24H9/1881
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1016390A
Cited
US1757664A
Cited
US1959035A
Cited
US2244314A
Cited
US2240367A
Cited
US2299154A
Cited
US2329920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |