Patent US2641927A successfully refreshed from Google Patents.
US2641927A
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US
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Well pipe vibrating apparatus
Assignee: Individual
•
Filing: 1951-02-01
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Granted: 1953-06-16
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Expires: 1971-02-01
Abstract
No abstract record available.
Inventors
- 👤 Donovan B Grable
- 👤 William A Vock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:40
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/003; E21B28/00; E21B47/00; E21B47/09; G; G01; G01V; G01V1/00; G01V1/02; G01V1/143; G01V1/147; G01V1/40; G01V1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR611047A
Cited
US1654619A
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US2261564A
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US2340959A
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US2396935A
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US2436047A
Cited
US2530308A
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US2530309A
Cited
US2550964A
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US2565279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |