US3539702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Termination for coaxial superconducting cable
Assignee: Balfour Beatty PLC
•
Filing: 1968-11-29
•
Granted: 1970-11-10
•
Expires: 1988-11-29
Abstract
No abstract record available.
Inventors
- 👤 Derek Reginald Edwards
- 👤 Anthony Harvey Powell
- 👤 Edward Charles Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:35
CPC Classifications
H; H01; H01B; H01B12/00; Y; Y02; Y02E; Y02E40/00; Y02E40/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3371145A
Cited
US3440326A
Cited
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 |