Patent US236719A successfully refreshed from Google Patents.
US236719A
Expired / Lapsed
US
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Vent-plug
Assignee: —
•
Filing: —
•
Granted: 1881-01-18
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Expires: 1898-01-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1471; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7881; Y10T137/7882; Y10T137/7885
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) | 1884-01-18 | 1884-07-19 | 1885-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1888-01-18 | 1888-07-19 | 1889-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1892-01-18 | 1892-07-19 | 1893-01-18 | $7700.00 | Window Closed / Lapsed |