Patent US2620689A successfully refreshed from Google Patents.
US2620689A
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US
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Deburring tool having a slender body for projecting into an aperture
Assignee: COGSDILL TWIST DRILL Co I
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Filing: 1950-02-18
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Granted: 1952-12-09
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Expires: 1970-02-18
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Cogsdill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:24
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/101; Y; Y10; Y10T; Y10T408/00; Y10T408/86; Y10T408/865; Y10T82/00; Y10T82/12; Y10T82/125; Y10T82/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US745101A
Cited
GB191202748A
Cited
US1761804A
Cited
US1980178A
Cited
US2314084A
Cited
US2364293A
Cited
US2437822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |