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Patent US509220A successfully refreshed from Google Patents.
US509220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
John gustafson
Assignee: —
•
Filing: —
•
Granted: 1893-11-21
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Expires: 1910-11-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:22
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04
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) | 1896-11-20 | 1897-05-22 | 1897-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-11-21 | 1901-05-23 | 1901-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-11-21 | 1905-05-23 | 1905-11-22 | $7700.00 | Window Closed / Lapsed |