Patent US3450216A successfully refreshed from Google Patents.
US3450216A
Expired / Lapsed
US
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Core orienting apparatus and method
Assignee: Norton Christensen Inc
•
Filing: 1965-05-21
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Granted: 1969-06-17
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Expires: 1985-05-21
Abstract
No abstract record available.
Inventors
- 👤 Helmut Hugel
- 👤 Tom Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:52
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735652A
Cited
US2489566A
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US2657013A
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US3052309A
Cited
US3059707A
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US3207240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |