US2589804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally fired safety pilot gas burner
Assignee: —
•
Filing: —
•
Granted: 1952-03-18
•
Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:30
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/72; F23N; F23N5/00; F23N5/20; F23N5/206; F23C; F23C3/00; F23C3/002; F23N5/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US434013A
Cited
US1963957A
Cited
US1271498A
Cited
US1353217A
Cited
US1434256A
Cited
US1692382A
Cited
US1933318A
Cited
GB376739A
Cited
US2100681A
Cited
US2367119A
Cited
US2427545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |