US2524476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical tuyere-type furnace
Assignee: Individual
•
Filing: 1946-10-22
•
Granted: 1950-10-03
•
Expires: 1966-10-22
Abstract
No abstract record available.
Inventors
- 👤 Richardson Leslie John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:52
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/005; C; C21; C21B; C21B7/00; F27B1/10; F27B1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US99415A
Cited
US303456A
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US405134A
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US766903A
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US1166904A
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US1724402A
Cited
GB276066A
Cited
US1775606A
Cited
US2031504A
Cited
US2345067A
Cited
US2343780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |