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US2839875A
Expired / Lapsed
US
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Machine for the grinding of cylindrical, conical and crowned spur gears and helical gears by the generating principle
Assignee: Reishauer Werkzeuge A G
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Filing: 1956-09-17
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Granted: 1958-06-24
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Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 Rickenmann Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:06
CPC Classifications
B; B23; B23F; B23F5/00; B23F5/02; B23F5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB729147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |