US3465321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential amplifier and peak detector for multiple speed magnetic tape transport
Assignee: Potter Instrument Co Inc
•
Filing: 1966-02-21
•
Granted: 1969-09-02
•
Expires: 1986-02-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick Reisfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:02
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/153; H03K5/1532
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2239042A
Cited
US2759049A
Cited
US3327299A
Cited
US3339192A
Cited
US3349383A
Cited
US3357002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |