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Patent US2419726A successfully refreshed from Google Patents.
US2419726A
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US
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Automatic worm gear hobbing machine
Assignee: Michigan Tool Co
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Filing: 1942-03-21
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Granted: 1947-04-29
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Expires: 1962-03-21
Abstract
No abstract record available.
Inventors
- 👤 Pelphrey Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:21
CPC Classifications
B; B23; B23F; B23F5/00; B23F5/20; B23F5/22; B23F11/00; B23F23/00; B23F23/12; Y; Y10; Y10T; Y10T409/00; Y10T409/10; Y10T409/101431; Y10T409/10159; Y10T409/102226; Y10T409/102544; Y10T409/103339; Y10T409/103498
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) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |