Patent US853546A successfully refreshed from Google Patents.
US853546A
Expired / Lapsed
US
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Method of fracturing rock.
Assignee: Individual
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Filing: 1906-06-14
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Granted: 1907-05-14
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Expires: 1926-06-14
Abstract
No abstract record available.
Inventors
- 👤 George S Githens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:46
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/22; E21C25/24; B; B28; B28D; B28D1/00; B28D1/02; B28D1/08; B28D1/088
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) | 1910-05-13 | 1910-11-12 | 1911-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-05-13 | 1914-11-12 | 1915-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-05-13 | 1918-11-12 | 1919-05-14 | $7700.00 | Window Closed / Lapsed |