US2547322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspended refractory brick and interposed oxidizable metallic plate furnace roof andprocess of constructing the same
Assignee: GEN REFRAETORIES Co
•
Filing: 1946-01-23
•
Granted: 1951-04-03
•
Expires: 1966-01-23
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:30
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1463241A
Cited
US1500240A
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US1636603A
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US1738527A
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US2163435A
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US2154813A
Cited
US2155165A
Cited
US2158759A
Cited
US2304170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |