US2458740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple spindle machine tool
Assignee: National Automatic Tool Co Inc
•
Filing: 1943-06-09
•
Granted: 1949-01-11
•
Expires: 1963-06-09
Abstract
No abstract record available.
Inventors
- 👤 Robert A Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:26
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/161; B23B39/165; F; F16; F16B; F16B2200/00; F16B2200/69
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US289627A
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US544068A
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US666509A
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US688860A
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US1003493A
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US1212472A
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US1296042A
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GB275514A
Cited
US1781109A
Cited
US1933157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |