US621216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining-caisson
Assignee: —
•
Filing: —
•
Granted: 1899-03-14
•
Expires: 1916-03-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
E; E02; E02D; E02D23/00; E02D23/04; E02D23/06
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) | 1902-03-14 | 1902-09-13 | 1903-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1906-03-14 | 1906-09-13 | 1907-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1910-03-14 | 1910-09-13 | 1911-03-15 | $7700.00 | Window Closed / Lapsed |