Patent US187364A successfully refreshed from Google Patents.
US187364A
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Improvement in trapsfor preventingthe inflow of backwater
Assignee: —
•
Filing: —
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Granted: 1877-02-13
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Expires: 1894-02-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:59
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7069; Y10T137/71; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7873; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/8593; Y10T137/86292; Y10T137/863
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) | 1880-02-13 | 1880-08-14 | 1881-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1884-02-13 | 1884-08-14 | 1885-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1888-02-13 | 1888-08-14 | 1889-02-13 | $7700.00 | Window Closed / Lapsed |