Patent US1482702A successfully refreshed from Google Patents.
US1482702A
Expired / Lapsed
US
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Fluid-operated well-drilling apparatus
Assignee: Individual
•
Filing: 1922-10-09
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Granted: 1924-02-05
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Expires: 1942-10-09
Abstract
No abstract record available.
Inventors
- 👤 Charles C Scharpenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:49
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236
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) | 1927-02-04 | 1927-08-06 | 1928-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-02-04 | 1931-08-06 | 1932-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-02-04 | 1935-08-06 | 1936-02-05 | $7700.00 | Window Closed / Lapsed |