Patent US2823013A successfully refreshed from Google Patents.
US2823013A
Expired / Lapsed
US
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Apparatus for dry drilling of bore holes
Assignee: Individual
•
Filing: 1952-09-19
•
Granted: 1958-02-11
•
Expires: 1972-09-19
Abstract
No abstract record available.
Inventors
- 👤 Stenuick Andre Pierre Camille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:00
CPC Classifications
E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1881258A
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US2033527A
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US2085279A
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US2241712A
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US2359147A
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US2620162A
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US2665115A
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US2661928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |