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Patent US2273258A successfully refreshed from Google Patents.
US2273258A
Expired / Lapsed
US
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Boring tool holder
Assignee: RK Le Blond Machine Tool Co
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Filing: 1941-05-09
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Granted: 1942-02-17
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Expires: 1961-05-09
Abstract
No abstract record available.
Inventors
- 👤 Willard L Groene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:24
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; Y; Y10; Y10T; Y10T408/00; Y10T408/55; Y10T408/556; Y10T408/5565; Y10T408/557; Y10T408/558; Y10T408/5583; Y10T408/5586
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) | 1945-02-16 | 1945-08-18 | 1946-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-16 | 1949-08-18 | 1950-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-16 | 1953-08-18 | 1954-02-17 | $7700.00 | Window Closed / Lapsed |