Patent FR2217518A1 successfully refreshed from Google Patents.
US3420537A
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US
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Workholder and expansible collet therefor
Assignee: Gleason Works
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Filing: 1965-10-22
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Granted: 1969-01-07
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Derek M Walters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:20
CPC Classifications
B; B23; B23F; B23F23/00; B23F23/02; B23F23/06; B23B; B23B31/00; B23B31/40; B23B31/4006; B23B31/4033; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1004; Y10T279/1008; Y10T279/1037; Y10T279/1041; Y10T279/1045; Y10T279/34; Y10T279/3487
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |