US3000435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace burner
Assignee: Selas Corp of America
•
Filing: 1950-04-28
•
Granted: 1961-09-19
•
Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick S Bloom
- 👤 James E Hovis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:46
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10; F23D11/101; F23D11/102; F23D11/002; F23D11/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1501838A
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US1587249A
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US1542491A
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AU1493528A
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US1841169A
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US1860942A
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GB418299A
Cited
FR820672A
Cited
US2215079A
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US2356865A
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US2425709A
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US2452543A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |