US3459915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge machining electrode comprising tungsten particles in a silver matrix
Assignee: Duracell Inc USA
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Filing: 1967-05-03
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Granted: 1969-08-05
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Expires: 1987-05-03
Abstract
No abstract record available.
Inventors
- 👤 Earl F Swazy
- 👤 James C Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:05
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04; B23H1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3244852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |