US2792058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vaporising oil burner and method of vaporising and burning heavy fuel
Assignee: Shell Development Co
•
Filing: 1953-04-06
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Granted: 1957-05-14
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Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas Alun
- 👤 Winter Ernest Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:00
CPC Classifications
F; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/22; F23R; F23R3/00; F23R3/28; F23R3/30; F23R3/32; F05; F05D; F05D2240/00; F05D2240/35; F05D2240/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US408644A
Cited
US573899A
Cited
US724253A
Cited
US1722505A
Cited
US1673119A
Cited
FR702673A
Cited
US2528671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |