US2847189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for reaming holes drilled in the earth
Assignee: Texaco Inc
•
Filing: 1953-01-08
•
Granted: 1958-08-12
•
Expires: 1973-01-08
Abstract
No abstract record available.
Inventors
- 👤 Austen M Shook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:46
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/322; E21B7/00; E21B7/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1323905A
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US1477933A
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US1498463A
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US2315629A
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US2702180A
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US2753154A
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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) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |