Patent US4319710A successfully refreshed from Google Patents.
US3553909A
Expired / Lapsed
US
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Method of sharpening pot broach rings
Assignee: Nachi Machining Technology Co
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Filing: 1969-08-19
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Granted: 1971-01-12
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Expires: 1989-08-19
Abstract
Abstract POT BROACH RINGS ARE SUCCESSIVELY REGROUND BY ALTERNATED FACE AND I.D. GRINDS TO INCREASE RING USAGE BY ADVANCING I.D. GROUND RINGS SUCCESSIVELY FORWARDLY IN A BROACH ASSEMBLY.
Inventors
- 👤 Richard W Tersch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:14
CPC Classifications
B; B24; B24B; B24B3/00; B24B3/16; Y; Y10; Y10T; Y10T407/00; Y10T407/15; Y10T407/16; Y10T407/1628; Y10T407/1642
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |