Patent US2593520A successfully refreshed from Google Patents.
US2593520A
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Well cementing apparatus
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1945-10-11
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Granted: 1952-04-22
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Expires: 1965-10-11
Abstract
No abstract record available.
Inventors
- 👤 Reuben C Baker
- 👤 Kriegel Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/10; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1782
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US650650A
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US694811A
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US836347A
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US1725539A
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US2005813A
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US2136015A
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US2212087A
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US2235318A
Cited
US2380022A
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US2393457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |