US3071723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting defects in magnetic tape
Assignee: Potter Instrument Co Inc
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Filing: 1960-05-03
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Granted: 1963-01-01
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Expires: 1980-05-03
Abstract
No abstract record available.
Inventors
- 👤 Gabor Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1816
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
IN A SYSTEM FOR TESTING MAGNETIC TAPE FOR DEFECTS, THE COMBINATION OF, MEANS FOR DERIVING SIGNALS FROM A MAGNETIC TAPE TO BE TESTED UPON WHICH HAVE BEEN RECORDED CONTINUING SIGNALS OF SUBSTANTIALLY CONSTANT REPETITION RATE, A FREE RUNNING MULTIVIBRATOR COUPLED TO SAID SIGNAL DERIVING MEANS AND SYNCHRONIZED BY SAID DERIVED SIGNALS, AN INVERTER FOR INVERTING THE PHASE OF SAID DERIVED SIGNALS, AN ONESHOT MULTIVIBRATOR CONTROLLED BY SAID FREE RUNNING MULTIVI-
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |