Patent US453950A successfully refreshed from Google Patents.
US453950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
walter
Assignee: —
•
Filing: —
•
Granted: 1891-06-09
•
Expires: 1908-06-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:40
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/661; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1894-06-08 | 1894-12-08 | 1895-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-06-08 | 1898-12-08 | 1899-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-06-09 | 1902-12-09 | 1903-06-10 | $7700.00 | Window Closed / Lapsed |