US656515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescopic drill-shaft.
Assignee: Individual
•
Filing: 1899-09-26
•
Granted: 1900-08-21
•
Expires: 1919-09-26
Abstract
No abstract record available.
Inventors
- 👤 Isaac N Cassity
- 👤 William J Cassity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07
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) | 1903-08-21 | 1904-02-20 | 1904-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-08-21 | 1908-02-20 | 1908-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-08-21 | 1912-02-20 | 1912-08-21 | $7700.00 | Window Closed / Lapsed |