US2670179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punch core orienting device
Assignee: Richfield Oil Corp
•
Filing: 1950-02-13
•
Granted: 1954-02-23
•
Expires: 1970-02-13
Abstract
No abstract record available.
Inventors
- 👤 Manley L Natland
- 👤 Raymond E Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:22
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1720877A
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US1841790A
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US1889921A
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US2303360A
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US2170716A
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US2184361A
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US2419468A
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US2413005A
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US2301307A
Cited
US2489566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |