Patent US1988673A successfully refreshed from Google Patents.
US1988673A
Expired / Lapsed
US
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Apparatus for burning liquid fuel
Assignee: Shell Development Co
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Filing: 1933-01-13
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Granted: 1935-01-22
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Expires: 1953-01-13
Abstract
No abstract record available.
Inventors
- 👤 Willem J D Van Dijck
- 👤 Adriaan M I Hoogendam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:40
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D5/00; F23C2700/00; F23C2700/02; F23C2700/026
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) | 1938-01-21 | 1938-07-23 | 1939-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-21 | 1942-07-23 | 1943-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-21 | 1946-07-23 | 1947-01-22 | $7700.00 | Window Closed / Lapsed |