Patent US2845940A successfully refreshed from Google Patents.
US2845940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas lift mandrel and valve
Assignee: US Industries Inc
•
Filing: 1953-02-18
•
Granted: 1958-08-05
•
Expires: 1973-02-18
Abstract
No abstract record available.
Inventors
- 👤 Henry U Garrett
- 👤 Clifford M Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:34
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1603604A
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US1523709A
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US1744087A
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US2008172A
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US2207129A
Cited
US2278532A
Cited
US2250464A
Cited
US2321003A
Cited
US2454160A
Cited
US2668553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |