US2957159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring device
Assignee: Phillips Petroleum Co
•
Filing: 1955-02-07
•
Granted: 1960-10-18
•
Expires: 1975-02-07
Abstract
No abstract record available.
Inventors
- 👤 Fitchette James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06; E21B47/12; E21B47/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2225668A
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US2233183A
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US2404062A
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US2379996A
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US2436834A
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US2547876A
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US2507351A
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US2564928A
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US2609438A
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US2586745A
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US2596531A
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US2810546A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |