US2842162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control device
Assignee: Halliburton Oil Well Cementing Co
•
Filing: 1955-01-17
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Granted: 1958-07-08
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Expires: 1975-01-17
Abstract
No abstract record available.
Inventors
- 👤 Harry E Schwegman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:07
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/08; G; G05; G05D; G05D7/00; G05D7/01; G05D7/0146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2042103A
Cited
US2211416A
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US2380022A
Cited
US2559244A
Cited
US2541464A
Cited
US2614793A
Cited
US2662554A
Cited
US2655217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |