Patent US2977726A successfully refreshed from Google Patents.
US2977726A
Expired / Lapsed
US
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Gear honing tool
Assignee: Nachi Machining Technology Co
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Filing: 1957-04-22
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Granted: 1961-04-04
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Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 David W Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:14
CPC Classifications
B; B23; B23F; B23F19/00; B23F19/05; B23F21/00; B23F21/03; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19953
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1955082A
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US1989650A
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US2165386A
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US2069116A
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US2076833A
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US2351842A
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US2324377A
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US2409958A
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US2527387A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |