US2799085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing well casing centering equipment
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1953-07-17
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Granted: 1957-07-16
•
Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 Reuben C Baker
- 👤 Thomas M Ragan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49895; Y10T29/49902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1466986A
Cited
US2089553A
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US2313393A
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US2454580A
Cited
US2546582A
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US2562083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |