Patent US2710657A successfully refreshed from Google Patents.
US2710657A
Expired / Lapsed
US
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Well scraping apparatus
Assignee: Individual
•
Filing: 1951-09-18
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Granted: 1955-06-14
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Expires: 1971-09-18
Abstract
No abstract record available.
Inventors
- 👤 Bernice M Scivally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:25
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2151416A
Cited
US2427052A
Cited
US2438673A
Cited
US2567475A
Cited
US2447966A
Cited
US2627925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |