US2675864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner for open-hearth furnaces
Assignee: Individual
•
Filing: 1952-02-28
•
Granted: 1954-04-20
•
Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jay J Seaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:09
CPC Classifications
F; F23; F23D; F23D11/00; Y; Y10; Y10T; Y10T137/00; Y10T137/9464
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1571179A
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US1800669A
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US854798A
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US1020955A
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US1169091A
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US1160806A
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US1232756A
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US1485495A
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US1870066A
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US1976208A
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US1980891A
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US2011554A
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FR843045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |