US3202978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical remote control and indicating system
Assignee: Hydril LLC
•
Filing: 1961-01-31
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Granted: 1965-08-24
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Expires: 1981-01-31
Abstract
No abstract record available.
Inventors
- 👤 George E Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:41
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/16; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
CONTROL MEANS ADAPTED TO BE CONNECTED IN A CIRCUIT BETWEEN A SOURCE OF ELECTRICAL POWER AND AN ELECTRICALLY ACTUABLE DEVICE; SAID CONTROL MEANS COMPRISING IN COMBINATION A MAIN SWITCH, CIRCUIT MEANS FOR CONNECTING THE SWITCH IN SAID CIRCUIT FOR ACTUATION OF THE DEVICE IN RESPONSE TO SWITCH CLOSURE, A SHUNT CIRCUIT CONNECTED ACROSS THE SWITCH TO BE ENERGIZED WHEN THE SWITCH IS OPEN, INDICATOR MEANS ENERGIZED BY CURRENT IN THE SHUNT CIRCUIT, TRANSFORMER MEANS FOR ENERGIZING THE INDICATOR MEANS WHEN THE SWITCH IS CLOSED, VARIABLE IMPEDANCE MEANS, CIRCUIT MEANS CONNECTING SAID IMPEDANCE MEANS IN A CONTROL CIRCUIT FOR ADJUSTABLY VARYING THE INDICATOR ENERGIZATION WHEN THE MAIN SWITCH IS OPEN, AND MEANS RESPONSIVE TO CLUSURE OF THE MAIN SWITCH FOR DISABLING SAID VARIABLE IMPEDANCE MEANS TO RENDER THE INDICATOR ENERGIZATION INDEPENDENT OF SAID IMPEDANCE MEANS WHEN THE MAIN SWITCH IS CLOSED.
Claim 2
Dependent Claim
140 words
CONTROL MEANS ADAPTED TO BE CONNECTED IN A CIRCUIT BETWEEN A SOURCE OF ELECTRICAL POWER AND AN ELECTRICALLY ACTUABLE DEVICE; SAID CONTROL MEANS COMPRISING IN COMBINATION A MAIN SWITCH, CIRCUIT MEANS FOR CONNECTING THE SWITCH IN SAID CIRCUIT FOR ACTUATION OF THE DEVICE IN RESPONSE TO SWITCH CLOSURE, A SHUNT CIRCUIT CONNECTED ACROSS THE SWITCH TO BE ENERGIZED WHEN THE SWITCH IS OPEN, INDICATOR MEANS ENERGIZED BY CURRENT IN THE SHUNT CIRCUIT, TRANSFORMER MEANS FOR ENERGIZING THE INDICATOR MEANS WHEN THE SWITCH IS CLOSED, VARIABLE IMPEDANCE MEANS, CIRCUIT MEANS CONNECTING SAID IMPEDANCE MEANS IN A CONTROL CIRCUIT FOR ADJUSTABLY VARYING THE INDICATOR ENERGIZATION WHEN THE MAIN SWITCH IS OPEN, AND MEANS RESPONSIVE TO CLUSURE OF THE MAIN SWITCH FOR DISABLING SAID VARIABLE IMPEDANCE MEANS TO RENDER THE INDICATOR ENERGIZATION INDEPENDENT OF SAID IMPEDANCE MEANS WHEN THE MAIN SWITCH IS CLOSED.
References Cited (Backward Citations)
US2157777A
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US2347523A
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US2354888A
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US2432899A
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |