Patent US3129388A successfully refreshed from Google Patents.
US3129388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode bias clamp
Assignee: Individual
•
Filing: 1960-12-29
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Granted: 1964-04-14
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Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Richard E Lang
- 👤 Charles H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:39
CPC Classifications
H; H04; H04B; H04B15/00; H04B15/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB549484A
Cited
FR1089358A
Cited
US2951208A
Cited
US2854606A
Cited
US2888527A
Cited
US3068423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |