US2878644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic velocity submerged combustion burner
Assignee: Experiment Inc
•
Filing: 1956-05-01
•
Granted: 1959-03-24
•
Expires: 1976-05-01
Abstract
No abstract record available.
Inventors
- 👤 John B Fenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:01
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971724A
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US1689551A
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US2159759A
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US2601000A
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US2659195A
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US2677368A
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US2647370A
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US2642850A
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US2598544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |