Patent US81226A successfully refreshed from Google Patents.
US81226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in piano-eooks
Assignee: —
•
Filing: —
•
Granted: 1868-08-18
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Expires: 1885-08-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:28
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/02; E05B65/025; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5097; Y10T70/5111; Y10T70/5115; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5248; Y10T70/5252; Y10T70/5261
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) | 1871-08-18 | 1872-02-17 | 1872-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1875-08-18 | 1876-02-17 | 1876-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1879-08-18 | 1880-02-17 | 1880-08-18 | $7700.00 | Window Closed / Lapsed |