Patent US505238A successfully refreshed from Google Patents.
US505238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-current governor
Assignee: —
•
Filing: —
•
Granted: 1893-09-19
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Expires: 1910-09-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:51
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/102; F04B39/1033; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/035; F16K15/04; F16K15/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/785; Y10T137/7852; Y10T137/7869; Y10T137/7871; Y10T137/7874
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) | 1896-09-18 | 1897-03-20 | 1897-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-09-19 | 1901-03-21 | 1901-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-09-19 | 1905-03-21 | 1905-09-20 | $7700.00 | Window Closed / Lapsed |