US2956453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-spindle automatic drilling machine
Assignee: AT&T Inc
•
Filing: 1958-02-10
•
Granted: 1960-10-18
•
Expires: 1978-02-10
Abstract
No abstract record available.
Inventors
- 👤 Bruce E Frankenfield
- 👤 Wennerberg August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:58
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/24; Y; Y10; Y10T; Y10T408/00; Y10T408/13; Y10T408/15; Y10T408/36; Y10T408/375; Y10T408/378; Y10T408/3788; Y10T408/3792; Y10T408/50; Y10T408/52; Y10T408/54; Y10T82/00; Y10T82/25; Y10T82/2514; Y10T82/2516
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1575308A
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US1904975A
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US1951093A
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US2049444A
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US2499564A
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US2578454A
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US2622488A
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US2623620A
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US2654270A
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US2809541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |