US3371273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic impedance measuring system utilizing a hybrid-like network operative over a wide range of frequencies
Assignee: Individual
•
Filing: 1961-07-17
•
Granted: 1968-02-27
•
Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Alford Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:16
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
SIGNAL PROCESSING APPARATUS COMPRISING, A SOURCE OF A FIRST SIGNAL OF A FIRST FREQUENCY, A SOURCE OF A SECOND SIGNAL OF A SECOND FREQUENCY, A NETWORRK HAVING A STANDARD IMPEDANCE, ANOTHER IMPEDANCE, AN INPUT AND AN OUTPUT SAID NETWORK BEING RESPONSIVE TO AN INPUT SIGNAL APPLIED AT ITS INPUT FOR PROVIDING AN OUTPUT SIGNAL OF THE SAME FREQUENCY AS SAID INPUT SIGNAL REPRESENTATIVE OF THE VECTOR DIFFERENCE IN IMPEDANCE BETWEEN SAID STANDARD AND SAID ANOTHER IMPEDANCES, MEANS FOR COUPLING SAID FIRST SOURCE TO SAID NETWORK INPUT, FIRST MEANS FOR COMBING SAID FIRST AND SECOND SIGNALS TO PROVIDE A REFERENCE SIGNAL OF A PREDETERMINED FREQUENCY, MEANS FOR MAINTAINING THE
Claim 2
Dependent Claim
108 words
SIGNAL PROCESSING APPARATUS COMPRISING, A SOURCE OF A FIRST SIGNAL OF A FIRST FREQUENCY, A SOURCE OF A SECOND SIGNAL OF A SECOND FREQUENCY, A NETWORRK HAVING A STANDARD IMPEDANCE, ANOTHER IMPEDANCE, AN INPUT AND AN OUTPUT SAID NETWORK BEING RESPONSIVE TO AN INPUT SIGNAL APPLIED AT ITS INPUT FOR PROVIDING AN OUTPUT SIGNAL OF THE SAME FREQUENCY AS SAID INPUT SIGNAL REPRESENTATIVE OF THE VECTOR DIFFERENCE IN IMPEDANCE BETWEEN SAID STANDARD AND SAID ANOTHER IMPEDANCES, MEANS FOR COUPLING SAID FIRST SOURCE TO SAID NETWORK INPUT, FIRST MEANS FOR COMBING SAID FIRST AND SECOND SIGNALS TO PROVIDE A REFERENCE SIGNAL OF A PREDETERMINED FREQUENCY, MEANS FOR MAINTAINING THE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |