Patent US2408652A successfully refreshed from Google Patents.
US2408652A
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US
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Center drill chuck
Assignee: International Business Machines Corp
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Filing: 1944-07-11
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Granted: 1946-10-01
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Expires: 1964-07-11
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:22
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/026; B23B31/0261; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/566
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-09-30 | 1950-04-01 | 1950-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-30 | 1954-04-01 | 1954-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-30 | 1958-04-01 | 1958-10-01 | $7700.00 | Window Closed / Lapsed |