US3123679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone test set
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:47
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A TESTING CIRCUIT FOR TESTING THE TIME DURATION OF A SERIES OF GENERATED PULSES COMPRISING: A PAIR OF CAPACITANCE CIRCUITS CONNECTED IN SERIES OPPOSITION, A CHARGING CIRCUIT MEANS INCLUDING A PAIR OF RESISTANCE CIRCUITS, MEANS RESPONSIVE TO A FIRST PULSE FOR CONNECTING THE CHARGING CIRCUIT MEANS TO THE CAPACITANCE CIRCUITS TO CHARGE THE CAPACITANCE CIRCUITS AT RATES DEPENDENT UPON THE VALUES OF THE RESISTANCE CIRCUITS, NORMALLY UNOPERATED MEANS FOR INDICATING A PREDETERMINED DIFFERENCE IN CHARGE ON THE CAPACITANCE CIRCUITS, AND
Claim 2
Dependent Claim
80 words
A TESTING CIRCUIT FOR TESTING THE TIME DURATION OF A SERIES OF GENERATED PULSES COMPRISING: A PAIR OF CAPACITANCE CIRCUITS CONNECTED IN SERIES OPPOSITION, A CHARGING CIRCUIT MEANS INCLUDING A PAIR OF RESISTANCE CIRCUITS, MEANS RESPONSIVE TO A FIRST PULSE FOR CONNECTING THE CHARGING CIRCUIT MEANS TO THE CAPACITANCE CIRCUITS TO CHARGE THE CAPACITANCE CIRCUITS AT RATES DEPENDENT UPON THE VALUES OF THE RESISTANCE CIRCUITS, NORMALLY UNOPERATED MEANS FOR INDICATING A PREDETERMINED DIFFERENCE IN CHARGE ON THE CAPACITANCE CIRCUITS, AND
References Cited (Backward Citations)
US1759837A
Cited
US2268222A
Cited
US2416102A
Cited
US2428488A
Cited
US2857484A
Cited
US2826648A
Cited
US2804604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |