US2989119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burners
Assignee: ORR AND SEMBOWER Inc
•
Filing: 1956-05-17
•
Granted: 1961-06-20
•
Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Burt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/008; F23C7/002; F23C7/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE520195A
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US1304402A
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US1501838A
Cited
US1449840A
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US2167183A
Cited
US2368490A
Cited
US2485656A
Cited
US2458542A
Cited
FR945817A
Cited
FR976758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |