Patent US2242510A successfully refreshed from Google Patents.
US2242510A
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US
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Adjustable countersink structure
Assignee: COGSDILL TWIST DRILL Co
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Filing: 1940-08-22
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Granted: 1941-05-20
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Expires: 1960-08-22
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Cogsdill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:37
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/104; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/564; Y10T408/5653
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) | 1944-05-19 | 1944-11-18 | 1945-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-05-19 | 1948-11-18 | 1949-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-05-19 | 1952-11-18 | 1953-05-20 | $7700.00 | Window Closed / Lapsed |