US581549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory-ring
Assignee: —
•
Filing: —
•
Granted: 1897-04-27
•
Expires: 1914-04-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:10
CPC Classifications
A; A44; A44C; A44C15/00; A44C15/0015
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) | 1900-04-27 | 1900-10-27 | 1901-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1904-04-27 | 1904-10-27 | 1905-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1908-04-27 | 1908-10-27 | 1909-04-28 | $7700.00 | Window Closed / Lapsed |