Patent US2683375A successfully refreshed from Google Patents.
US2683375A
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Drilling machine drive
Assignee: CONST ELECTRO MECANIQUES DE SA
•
Filing: 1950-05-26
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Granted: 1954-07-13
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Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Gerentes Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:02
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/081; Y; Y10; Y10S; Y10S408/00; Y10S408/705; Y10T; Y10T408/00; Y10T408/65; Y10T408/675; Y10T74/00; Y10T74/18; Y10T74/18024; Y10T74/18568; Y10T74/18576; Y10T74/18624; Y10T74/1864
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023841A
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US2240795A
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US2244127A
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US2365681A
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US2434120A
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US2432313A
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US2520014A
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US2547079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |