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US3176158A
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Signal generator
Assignee: Services Petroliers Schlumberger SA
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Filing: 1962-04-30
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Granted: 1965-03-30
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Guignard Jean Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:38
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523; H03; H03B; H03B11/00; H03B11/04; H03K; H03K17/00; H03K17/18; H03K3/00; H03K3/02; H03K3/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A SIGNAL GENERATOR COMPRISING: A SERIES CIRCUIT INCLUDING AN INDUCTOR, A CAPACITOR, LOAD MEANS AND A FIRST CONTROLLABLE SWITCHING DEVICE; CIRCUIT MEANS FOR CHARGING THE CAPACITOR; CIRCUIT MEANS FOR RENDERING THE FIRST SWITCHING DEVICE CONDUCTIVE TO ENABLE THE CAPACITOR TO DISCHARGE THROUGH THE INDUCTOR AND THE LOAD MEANS; A SECOND CONTROLLABLE SWITCHING DEVICE INCLUDED IN THE CHARGING CIRCUIT MEANS; AND CIRCUIT MEANS RESPONSIVE TO A VOLTAGE CONDITION IN THE SERIES CIRCUIT FOR RENDERING THE SECOND SWITCHING DEVICE CONDUCTIVE TO ENABLE RAPID RECHARGING OF THE CAPACITOR.
Claim 2
Dependent Claim
85 words
A SIGNAL GENERATOR COMPRISING: A SERIES CIRCUIT INCLUDING AN INDUCTOR, A CAPACITOR, LOAD MEANS AND A FIRST CONTROLLABLE SWITCHING DEVICE; CIRCUIT MEANS FOR CHARGING THE CAPACITOR; CIRCUIT MEANS FOR RENDERING THE FIRST SWITCHING DEVICE CONDUCTIVE TO ENABLE THE CAPACITOR TO DISCHARGE THROUGH THE INDUCTOR AND THE LOAD MEANS; A SECOND CONTROLLABLE SWITCHING DEVICE INCLUDED IN THE CHARGING CIRCUIT MEANS; AND CIRCUIT MEANS RESPONSIVE TO A VOLTAGE CONDITION IN THE SERIES CIRCUIT FOR RENDERING THE SECOND SWITCHING DEVICE CONDUCTIVE TO ENABLE RAPID RECHARGING OF THE CAPACITOR.
References Cited (Backward Citations)
US2455373A
Cited
US2448070A
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US2627031A
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US2891155A
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US2907900A
Cited
US2916640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |