Patent US2986206A successfully refreshed from Google Patents.
US2986206A
Expired / Lapsed
US
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Combustion device for liquid fuel
Assignee: Shell USA Inc
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Filing: 1958-02-26
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Granted: 1961-05-30
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Expires: 1978-02-26
Abstract
No abstract record available.
Inventors
- 👤 Aaldert R Boelsma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:47
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D11/00; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |