Patent US2348657A successfully refreshed from Google Patents.
US2348657A
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US
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Automatic screw machine
Assignee: Davenport Machine Tool Co Inc
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Filing: 1941-10-11
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Granted: 1944-05-09
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Expires: 1961-10-11
Abstract
No abstract record available.
Inventors
- 👤 Frederick G Silva
- 👤 Wray S Seymour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:46
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/341; B23Q5/347; B23B; B23B7/00; B23B7/02; B23B7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5159; Y10T29/5161; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
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) | 1947-05-09 | 1947-11-08 | 1948-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-05-09 | 1951-11-08 | 1952-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-05-09 | 1955-11-08 | 1956-05-09 | $7700.00 | Window Closed / Lapsed |