US2634101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for accelerating the removal of cuttings from the bottom of wells
Assignee: Individual
•
Filing: 1949-07-08
•
Granted: 1953-04-07
•
Expires: 1969-07-08
Abstract
No abstract record available.
Inventors
- 👤 Sloan Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:53
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/0078; E21B21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE201368C
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US762808A
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CH58849A
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US1182134A
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US1338460A
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US1853379A
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US1990007A
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US2017834A
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US2085941A
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GB541192A
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US2307658A
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US2485098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |