Patent US2728254A successfully refreshed from Google Patents.
US2728254A
Expired / Lapsed
US
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Tracer controlled lathe structure
Assignee: RK Le Blond Machine Tool Co
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Filing: 1953-11-05
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Granted: 1955-12-27
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Expires: 1973-11-05
Abstract
No abstract record available.
Inventors
- 👤 Harold J Siekmann
- 👤 George W Luning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:29
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q2735/00; B23Q2735/02; B23Q2735/025; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/25; Y10T82/2593
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US804131A
Cited
FR488484A
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US1523310A
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US2314250A
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US2494196A
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US2526487A
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US2587542A
Cited
US2612070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |