Patent US2883197A successfully refreshed from Google Patents.
US2883197A
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Magnetic driver for annular work
Assignee: O S WALKER COMPANY Inc
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Filing: 1957-11-07
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Granted: 1959-04-21
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Daniel F Gotha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/15; B23Q3/154; B23Q3/1546; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/28; B23Q3/152; B23B2270/00; B23B2270/38; Y; Y10; Y10T; Y10T279/00; Y10T279/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |