US2994367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion methods and apparatus
Assignee: Silent Glow Oil Burner Corp
•
Filing: 1954-06-28
•
Granted: 1961-08-01
•
Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Rallston M Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/40; F23G5/42; F23C; F23C1/00; F23C9/00; F23C9/06; F23G5/08; F23G5/12; F23M; F23M9/00; F23M9/06
Claims Analysis
Total Claims: 0
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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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |