Patent US2633086A successfully refreshed from Google Patents.
US2633086A
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US
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Gas lift system and apparatus therefor
Assignee: MCEVOY CO
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Filing: 1947-06-19
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Granted: 1953-03-31
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Expires: 1967-06-19
Abstract
No abstract record available.
Inventors
- 👤 Zaba Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:19
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2339487A
Cited
US2006909A
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US2082325A
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US2132738A
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US2142483A
Cited
US2317121A
Cited
US2361718A
Cited
US2368999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |