Patent US1804751A successfully refreshed from Google Patents.
US1804751A
Expired / Lapsed
US
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Boiler feed water control device
Assignee: DOBLE STEAM MOTORS Corp
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Filing: 1924-10-06
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Granted: 1931-05-12
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Expires: 1944-10-06
Abstract
No abstract record available.
Inventors
- 👤 Doble Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
F; F22; F22D; F22D5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2594; Y10T137/2597; Y10T137/7722; Y10T137/7781; Y10T137/7784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-05-11 | 1934-11-10 | 1935-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-11 | 1938-11-10 | 1939-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-11 | 1942-11-10 | 1943-05-12 | $7700.00 | Window Closed / Lapsed |