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Patent US2525669A successfully refreshed from Google Patents.
US2525669A
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US
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Automatic trepans
Assignee: Individual
•
Filing: 1947-12-01
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Granted: 1950-10-10
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Expires: 1967-12-01
Abstract
No abstract record available.
Inventors
- 👤 Hainault Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1695; Y; Y10; Y10S; Y10S408/00; Y10S408/703; Y10T; Y10T408/00; Y10T408/70; Y10T408/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR12728E
Cited
US1701423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |