US2142484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-lift pump
Assignee: Phillips Petroleum Co
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Filing: 1936-10-29
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Granted: 1939-01-03
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Expires: 1956-10-29
Abstract
No abstract record available.
Inventors
- 👤 Gerald P Jennings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:08
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/02; F04B47/04; E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-01-02 | 1942-07-04 | 1943-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-02 | 1946-07-04 | 1947-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-02 | 1950-07-04 | 1951-01-03 | $7700.00 | Window Closed / Lapsed |