US3433301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve system for a well packer
Assignee: Schlumberger Technology Corp
•
Filing: 1967-10-05
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Granted: 1969-03-18
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Expires: 1987-10-05
Abstract
No abstract record available.
Inventors
- 👤 Robert M Mcever Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:57
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1294; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2785755A
Cited
US3280917A
Cited
US3306366A
Cited
US3334691A
Cited
US3356140A
Cited
US3347318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |