Patent US444471A successfully refreshed from Google Patents.
US444471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barton b
Assignee: —
•
Filing: —
•
Granted: 1891-01-13
•
Expires: 1908-01-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/06; H05B31/08; H05B31/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933
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) | 1894-01-12 | 1894-07-14 | 1895-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-01-12 | 1898-07-14 | 1899-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-01-13 | 1902-07-15 | 1903-01-14 | $7700.00 | Window Closed / Lapsed |