Patent US2430997A successfully refreshed from Google Patents.
US2430997A
Expired / Lapsed
US
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Convertible center drill and live and dead center
Assignee: Individual
•
Filing: 1945-01-02
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Granted: 1947-11-18
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Expires: 1965-01-02
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:49
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/0063; B23B23/00; B23B23/02; B23B23/04; B23B2260/00; B23B2260/04; Y; Y10; Y10T; Y10T408/00; Y10T408/70; Y10T408/83; Y10T82/00; Y10T82/25; Y10T82/2568
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1814087A
Cited
US2366806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |