Patent US3137822A successfully refreshed from Google Patents.
US3137822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for achieving symmetrical response and simple time characteristic
Assignee: Individual
•
Filing: 1958-01-31
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Granted: 1964-06-16
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Expires: 1978-01-31
Abstract
No abstract record available.
Inventors
- 👤 Norman J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:24
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/08; H03D1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
IN COMBINATION WITH A MODULATED SIGNAL CIRCUIT A CIRCUIT FOR SELECTING THE MODULATING COMPONENT COMPRISING A PAIR OF UNILATERAL MEANS EACH RESPONSIVE RESPECTIVELY TO ONE POLARITY OF THE OUTPUT OF SAID MODULATED SIGNAL CIRCUIT, EACH OF SAID UNILATERAL MEANS HAVING SUBSTANTIALLY EQUIVALENT ELECTRICAL LOAD CHARACTERISTICS, AND
Claim 2
Dependent Claim
46 words
IN COMBINATION WITH A MODULATED SIGNAL CIRCUIT A CIRCUIT FOR SELECTING THE MODULATING COMPONENT COMPRISING A PAIR OF UNILATERAL MEANS EACH RESPONSIVE RESPECTIVELY TO ONE POLARITY OF THE OUTPUT OF SAID MODULATED SIGNAL CIRCUIT, EACH OF SAID UNILATERAL MEANS HAVING SUBSTANTIALLY EQUIVALENT ELECTRICAL LOAD CHARACTERISTICS, AND
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |