US643082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core breaker and lifter for rock-drills.
Assignee: Individual
•
Filing: 1898-09-22
•
Granted: 1900-02-06
•
Expires: 1918-09-22
Abstract
No abstract record available.
Inventors
- 👤 Milan C Bullock
- 👤 Mary A Bullock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:53
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/10; E21B25/14; E21B25/12
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) | 1903-02-06 | 1903-08-08 | 1904-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-02-06 | 1907-08-08 | 1908-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-02-06 | 1911-08-08 | 1912-02-07 | $7700.00 | Window Closed / Lapsed |