US2604209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler water reclaiming device
Assignee: Individual
•
Filing: 1947-03-19
•
Granted: 1952-07-22
•
Expires: 1967-03-19
Abstract
No abstract record available.
Inventors
- 👤 Earl D Hall
- 👤 Harold D Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:54
CPC Classifications
B; B61; B61C; B61C1/00; B61C1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2423793A
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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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |