Patent US1974852A successfully refreshed from Google Patents.
Patent US2620709A successfully refreshed from Google Patents.
US2620709A
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Method of and apparatus for cutting and chamfering gears
Assignee: Gleason Works
•
Filing: 1946-09-17
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Granted: 1952-12-09
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Expires: 1966-09-17
Abstract
No abstract record available.
Inventors
- 👤 Wildhaber Ernest
- 👤 Leonard O Carlsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:17
CPC Classifications
B; B23; B23F; B23F21/00; B23F21/24; B23F19/00; B23F19/10; B23F21/241; B23F21/243; Y; Y10; Y10T; Y10T407/00; Y10T407/15; Y10T407/17; Y10T407/1745; Y10T409/00; Y10T409/10; Y10T409/101113; Y10T409/101272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1976984A
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US1985409A
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US2184232A
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US2135819A
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US2343407A
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US2329804A
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US2392278A
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US2438329A
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US2443089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |