US2870829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heat fuel burner
Assignee: Selas Corp of America
•
Filing: 1954-03-26
•
Granted: 1959-01-27
•
Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 Williams John Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
F; F23; F23C; F23C99/00; F23D; F23D99/00; F23D99/002; F23D99/004; F23C2700/00; F23C2700/04; F23C2700/043; F23D2206/00; F23D2206/0057
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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |