US3483488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced modulator-demodulator circuit with negative feedback in switching element
Assignee: Tektronix Inc
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Filing: 1967-10-12
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Granted: 1969-12-09
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Expires: 1987-10-12
Abstract
No abstract record available.
Inventors
- 👤 Philip S Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:17
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/22; H03D1/229
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) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |