US2992019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing joint having metal-to-metal sealing means responsive to fluid pressure
Assignee: Hydril LLC
•
Filing: 1958-07-07
•
Granted: 1961-07-11
•
Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 Melvin D Macarthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:23
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/11; F16L55/1108; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/0423; E21B17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US951704A
Cited
FR544656A
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US2006520A
Cited
US2062407A
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US2111196A
Cited
US2239942A
Cited
US2746486A
Cited
US2813567A
Cited
US2907589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |