US2738852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deaerating heater
Assignee: Elliott Co
•
Filing: 1954-02-09
•
Granted: 1956-03-20
•
Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Freneau Philip
- 👤 Frank A Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0005; B01D19/001; B01D19/0042; B01D19/0047; C; C02; C02F; C02F1/00; C02F1/20
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |