Patent US3052301A successfully refreshed from Google Patents.
US3052301A
Expired / Lapsed
US
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Multiple tubing string well completion equipment
Assignee: Vetco Gray LLC
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Filing: 1957-05-15
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Granted: 1962-09-04
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Expires: 1977-05-15
Abstract
No abstract record available.
Inventors
- 👤 John D Watts
- 👤 James C Ireland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:21
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335355A
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US2522444A
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US2708975A
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US2713909A
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US2766829A
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DE1054938B
Cited
US2885005A
Cited
US2794505A
Cited
US2889886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |