US2806517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil atomizing double vortex burner
Assignee: Shell Development Co
•
Filing: 1954-07-28
•
Granted: 1957-09-17
•
Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Nuyl Johannes A Te
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:14
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/002; F23C; F23C3/00; F23C7/00; F23C7/002; F23C2202/00; F23C2202/40; F23D2900/00; F23D2900/00016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1665800A
Cited
US1943083A
Cited
US2464791A
Cited
US2539165A
Cited
US2560074A
Cited
US2678615A
Cited
FR1062062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |