Patent US2224696A successfully refreshed from Google Patents.
Patent US844873A successfully refreshed from Google Patents.
US844873A
Expired / Lapsed
US
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Feed-water regulator.
Assignee: FREDERICK W SPARKS
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Filing: 1906-06-20
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Granted: 1907-02-19
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Expires: 1926-06-20
Abstract
No abstract record available.
Inventors
- 👤 Thomas Keenan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:41
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/20; F16T1/22; F16T1/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937; Y10T137/2947; Y10T137/2965; Y10T137/2968
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) | 1910-02-18 | 1910-08-20 | 1911-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-02-18 | 1914-08-20 | 1915-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-02-18 | 1918-08-20 | 1919-02-19 | $7700.00 | Window Closed / Lapsed |