US970725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mining coal.
Assignee: Individual
•
Filing: 1907-10-19
•
Granted: 1910-09-20
•
Expires: 1927-10-19
Abstract
No abstract record available.
Inventors
- 👤 Harry A Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:50
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/08; B28D1/088; E; E21; E21C; E21C25/00; E21C25/22; E21C25/24
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) | 1913-09-19 | 1914-03-21 | 1914-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-09-19 | 1918-03-21 | 1918-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-09-19 | 1922-03-21 | 1922-09-20 | $7700.00 | Window Closed / Lapsed |