US2770322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark and fly ash arrestor
Assignee: Individual
•
Filing: 1954-05-20
•
Granted: 1956-11-13
•
Expires: 1974-05-20
Abstract
No abstract record available.
Inventors
- 👤 Jr James W Banham
- 👤 Jr William A Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:34
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/02; F23J15/022; F23J15/027; B; B01; B01D; B01D45/00; B01D45/12; B01D45/16; B01D46/00; B01D46/0084; B01D46/0091; B01D46/0093
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |