US3468387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal coring method and device
Assignee: NEW PROCESS IND Inc
•
Filing: 1967-04-17
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Granted: 1969-09-23
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Expires: 1987-04-17
Abstract
No abstract record available.
Inventors
- 👤 Glendon M Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:25
CPC Classifications
E; E21; E21B; E21B25/00; E21B7/00; E21B7/14; E21B7/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US914636A
Cited
US1348815A
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US1456983A
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US1989926A
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US2341572A
Cited
US2313806A
Cited
US2623149A
Cited
US3357505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |