Patent US2403431A successfully refreshed from Google Patents.
US2403431A
Expired / Lapsed
US
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Gas burner
Assignee: FURNACE ENGINEERS Inc
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Filing: 1944-09-20
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Granted: 1946-07-09
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Expires: 1964-09-20
Abstract
No abstract record available.
Inventors
- 👤 Dobrin Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:50
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/46; F23D14/62; F23D14/64; F23D2900/00; F23D2900/14; F23D2900/14642
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-07-08 | 1950-01-07 | 1950-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-08 | 1954-01-07 | 1954-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-08 | 1958-01-07 | 1958-07-09 | $7700.00 | Window Closed / Lapsed |