US2821246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination oil-gas burner and gas burner adapter for gun-type oil burner
Assignee: SYNCHRONOUS FLAME Inc
•
Filing: 1951-05-14
•
Granted: 1958-01-28
•
Expires: 1971-05-14
Abstract
No abstract record available.
Inventors
- 👤 Harris J Ide
- 👤 Louis D Schmit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:43
CPC Classifications
F; F23; F23D; F23D17/00; F23D17/002; F23D11/00; F23D11/001
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |