US2534377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler furnace
Assignee: SATCHWELL
•
Filing: 1946-09-26
•
Granted: 1950-12-19
•
Expires: 1966-09-26
Abstract
No abstract record available.
Inventors
- 👤 Satchwell Leonard
- 👤 Royal Farnham
- 👤 William H Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:43
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/24; F24H1/26; F23; F23B; F23B50/00; F23B50/02; F23B90/00; F23B90/04; F23B2700/00; F23B2700/011; F24H2230/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |