US2767784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel burner
Assignee: Industrial Systems Inc
•
Filing: 1951-03-22
•
Granted: 1956-10-23
•
Expires: 1971-03-22
Abstract
No abstract record available.
Inventors
- 👤 Robert C Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:59
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/004; F23D; F23D99/00; F23D99/002; F23D99/004; F23D99/005
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |