US3436596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensation circuit for electroluminescent lamps
Assignee: Lear Siegler Inc
•
Filing: 1960-08-31
•
Granted: 1969-04-01
•
Expires: 1980-08-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond V Kline
- 👤 Ronald A Bross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:32
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F3/00; G05F3/02; G05F3/04; H; H05; H05B; H05B44/00; Y; Y02; Y02B; Y02B20/00; Y02B20/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A CONTROL CIRCUIT FOR MAINTAINING A CONSTANT INTENSITY OF LUMINESCENCE FROM ELECTROLUMINESCENT DEVICES, COMPRISING: A SOURCE OF EXCITATION VOLTAGE HAVING A PREDETERMINED FREQUENCY, AN ELECTROLUMINESCENT DEVICE IN SERIES WITH SAID SOURCE; AND MEANS INTERPOSED IN CIRCUIT BETWEEN SAID SOURCE AND SAID DEVICE FOR MAINTAINING THE CURRENT FLOWING THROUGH SAID DEVICE AT A VALUE WHICH IS NOT AFFECTED BY CHANGES IN THE IMPEDANCE OF SAID DEVICE, SAID MEANS INCLUDING A COMPONENT WHICH, AT THE OPERATING FREQUENTLY OF SAID SOURCE, HAS AN IMPEDANCE MUCH LARGER THAN THAT OF SAID ELECTROLUMINESCENT DEVICE SUCH THAT SAID CURRENT IS SUBSTANTIALLY DETERMINED SOLELY BY SAID COMPONENT.
Claim 2
Dependent Claim
100 words
A CONTROL CIRCUIT FOR MAINTAINING A CONSTANT INTENSITY OF LUMINESCENCE FROM ELECTROLUMINESCENT DEVICES, COMPRISING: A SOURCE OF EXCITATION VOLTAGE HAVING A PREDETERMINED FREQUENCY, AN ELECTROLUMINESCENT DEVICE IN SERIES WITH SAID SOURCE; AND MEANS INTERPOSED IN CIRCUIT BETWEEN SAID SOURCE AND SAID DEVICE FOR MAINTAINING THE CURRENT FLOWING THROUGH SAID DEVICE AT A VALUE WHICH IS NOT AFFECTED BY CHANGES IN THE IMPEDANCE OF SAID DEVICE, SAID MEANS INCLUDING A COMPONENT WHICH, AT THE OPERATING FREQUENTLY OF SAID SOURCE, HAS AN IMPEDANCE MUCH LARGER THAN THAT OF SAID ELECTROLUMINESCENT DEVICE SUCH THAT SAID CURRENT IS SUBSTANTIALLY DETERMINED SOLELY BY SAID COMPONENT.
References Cited (Backward Citations)
US2818511A
Cited
US2824276A
Cited
US2859367A
Cited
US2895081A
Cited
US2836766A
Cited
US2937298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |