Patent US4984101A successfully refreshed from Google Patents.
Patent US2247689A successfully refreshed from Google Patents.
US2247689A
Expired / Lapsed
US
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Liquid fuel burning apparatus
Assignee: Perfection Stove Co
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Filing: 1939-04-15
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Granted: 1941-07-01
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Expires: 1959-04-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:48
CPC Classifications
F; F24; F24C; F24C5/00; F24C5/18; F23; F23D; F23D5/00; F23D5/12; F23D5/14; Y; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/1987; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86163
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) | 1944-06-30 | 1944-12-30 | 1945-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-06-30 | 1948-12-30 | 1949-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-06-30 | 1952-12-30 | 1953-07-01 | $7700.00 | Window Closed / Lapsed |