US2570073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall
Assignee: Individual
•
Filing: 1945-11-03
•
Granted: 1951-10-02
•
Expires: 1965-11-03
Abstract
No abstract record available.
Inventors
- 👤 George P Reintjes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US614206A
Cited
US1971312A
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US1703814A
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US1922599A
Cited
GB265422A
Cited
DE474596C
Cited
US1732514A
Cited
US1815750A
Cited
US1787019A
Cited
US1851842A
Cited
US2239662A
Cited
US2228819A
Cited
US2263004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |