US3539754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable eccentric overcutting electrical discharge machining device
Assignee: Nortel Networks Ltd
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Filing: 1967-08-31
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Granted: 1970-11-10
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Expires: 1987-08-31
Abstract
No abstract record available.
Inventors
- 👤 David James Furze
- 👤 Joseph Louis Lagasse
- 👤 Vilmos Gyula Fodor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:51
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26; B23H7/28; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/5468; B23Q1/5481; B23Q1/56; B23Q1/60; B23Q1/62; B23Q1/621
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |