US2992676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial gas burner
Assignee: Selas Corp of America
•
Filing: 1957-07-10
•
Granted: 1961-07-18
•
Expires: 1977-07-10
Abstract
No abstract record available.
Inventors
- 👤 James B Henwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:25
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/12; F23D14/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE564754C
Cited
US792642A
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US1352351A
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US1991894A
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US2215079A
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US2226816A
Cited
GB551568A
Cited
US2547735A
Cited
US2935127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |