Patent US551841A successfully refreshed from Google Patents.
US551841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Johann heinrich spoerl
Assignee: —
•
Filing: —
•
Granted: 1895-12-24
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Expires: 1912-12-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:23
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/306664
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) | 1898-12-23 | 1899-06-24 | 1899-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-12-24 | 1903-06-25 | 1903-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-12-24 | 1907-06-25 | 1907-12-25 | $7700.00 | Window Closed / Lapsed |