Patent US2689000A successfully refreshed from Google Patents.
US2689000A
Expired / Lapsed
US
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Furnace lighter with cam interlocked air operated controls
Assignee: Babcock and Wilcox Co
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Filing: 1951-06-06
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Granted: 1954-09-14
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Expires: 1971-06-06
Abstract
No abstract record available.
Inventors
- 👤 Musat George
- 👤 Walter E Dueringer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:33
CPC Classifications
F; F23; F23Q; F23Q3/00; F23Q3/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1735911A
Cited
US2047523A
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US2336538A
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US2382483A
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US2439609A
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US2596944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |