Patent US1371884A successfully refreshed from Google Patents.
US1371884A
Expired / Lapsed
US
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Well-drilling machine
Assignee: Individual
•
Filing: 1920-06-11
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Granted: 1921-03-15
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Expires: 1940-06-11
Abstract
No abstract record available.
Inventors
- 👤 Fred A Focks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:47
CPC Classifications
E; E21; E21B; E21B19/00; Y; Y10; Y10T; Y10T74/00; Y10T74/17; Y10T74/177; Y10T74/19; Y10T74/19605; Y10T74/19614
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) | 1924-03-14 | 1924-09-13 | 1925-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-03-14 | 1928-09-13 | 1929-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-03-14 | 1932-09-13 | 1933-03-15 | $7700.00 | Window Closed / Lapsed |