US3456087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply and automatic control system for high-speed electric discharge machining apparatus
Assignee: Siltronics Inc
•
Filing: 1965-08-10
•
Granted: 1969-07-15
•
Expires: 1985-08-10
Abstract
No abstract record available.
Inventors
- 👤 Terry O Hockenberry
- 👤 Everard M Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:25
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1854490A
Cited
US2432343A
Cited
US2444715A
Cited
US2634392A
Cited
US2944208A
Cited
US2886693A
Cited
US3211882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |