Patent US2987939A successfully refreshed from Google Patents.
US2987939A
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US
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Electrode head for electro-erosively operating machine tools and drive therefor
Assignee: Agie Charmilles SA
•
Filing: 1958-07-08
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Granted: 1961-06-13
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Expires: 1978-07-08
Abstract
No abstract record available.
Inventors
- 👤 Waninger Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:30
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26; B23H7/28; B23H7/30; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/385; Y10T408/65; Y10T408/675; Y10T408/6771; Y10T408/6774; Y10T74/00; Y10T74/17; Y10T74/173; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18616; Y10T74/18784; Y10T74/19; Y10T74/19023; Y10T74/19051; Y10T74/19065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US628190A
Cited
US1302222A
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GB412892A
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US2403092A
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US2385665A
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US2413203A
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US2628324A
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US2792723A
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US2773968A
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US2916949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |