US2493650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve device for well conduits
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1946-03-01
•
Granted: 1950-01-03
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Reuben C Baker
- 👤 Jr William S Althouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:28
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/14; E21B34/142; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1789; Y10T137/8811
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US373440A
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US455913A
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US1040226A
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US1579140A
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US1673616A
Cited
US1640408A
Cited
US2002783A
Cited
US2250813A
Cited
US2240119A
Cited
US2330267A
Cited
US2338719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |