Patent US690546A successfully refreshed from Google Patents.
US690546A
Expired / Lapsed
US
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Drainage system for steam plants.
Assignee: Individual
•
Filing: 1901-04-24
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Granted: 1902-01-07
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Expires: 1921-04-24
Abstract
No abstract record available.
Inventors
- 👤 John Angell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:44
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/20; F16T1/22; F16T1/24; Y; Y10; Y10S; Y10S55/00; Y10S55/23; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937; Y10T137/2947; Y10T137/2965; Y10T137/2968; Y10T137/7287; Y10T137/7313; Y10T137/7316; Y10T137/7319; Y10T137/7358; Y10T137/7381; Y10T137/7387
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) | 1905-01-06 | 1905-07-08 | 1906-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1909-01-06 | 1909-07-08 | 1910-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1913-01-06 | 1913-07-08 | 1914-01-07 | $7700.00 | Window Closed / Lapsed |