Patent US3497930A successfully refreshed from Google Patents.
US3497930A
Expired / Lapsed
US
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Method of abrasively shaping an electrode for electric discharge machining
Assignee: Individual
•
Filing: 1966-04-27
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Granted: 1970-03-03
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Expires: 1986-04-27
Abstract
No abstract record available.
Inventors
- 👤 Thomas J O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:34
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04; B23H7/00; B23H7/26; B24; B24B; B24B35/00; B24B35/005; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9411; Y10T83/9423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2308860A
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US2346975A
Cited
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Cited
US2704333A
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US2924701A
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US2909641A
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US3271281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |