US2479394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well implement
Assignee: Phillips Petroleum Co
•
Filing: 1944-08-24
•
Granted: 1949-08-16
•
Expires: 1964-08-24
Abstract
No abstract record available.
Inventors
- 👤 Jesse S Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:24
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2058327A
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US2043225A
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US2092041A
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US2156207A
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US2183654A
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US2190901A
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US2319493A
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US2361558A
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US2373005A
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US2357589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |