US3385947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for combined electrical dischargemachining and electrochemical machining
Assignee: Individual
•
Filing: 1963-11-12
•
Granted: 1968-05-28
•
Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Kiyoshi Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:59
CPC Classifications
B; B23; B23H; B23H7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2295097A
Cited
US2526423A
Cited
US2757688A
Cited
US2813966A
Cited
US2773968A
Cited
US2996602A
Cited
US2981822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |