US3414730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photorheostat including discharge lamp and masking means and utilizing length of discharge
Assignee: CIE IND FRANCAISE TUBES ELECT
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Filing: 1966-01-27
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Granted: 1968-12-03
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Expires: 1986-01-27
Abstract
No abstract record available.
Inventors
- 👤 Nicolas Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:29
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0047; H10; H10F; H10F55/00; H10F55/20; H10F55/205; H10F55/208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PHOTORHEOSTAT COMPRISING A VARIABLE LIGHT SOURCE CONSISTING OF A DISCHARGE LAMP INCORPORATING AN ANODE AND A CATHODE BETWEEN WHICH A VARIABLE VOLTAGE IS APPLIED, SAID CATHODE BEING PARALLEL TO THE LONGITUDINAL AXIS OF THE LAMP, A PHOTOELECTRIC CELL DISPOSED IN FRONT OF SAID DISCHARGE LAMP, AND A SCREEN DISPOSED BETWEEN SAID DISCHARGE LAMP AND SAID PHOTOELECTRIC CELL, SAID SCREEN EXTENDING ALONG A CERTAIN LENGTH AND OVERLAPPING THE CATHODE END
Claim 2
Dependent Claim
70 words
A PHOTORHEOSTAT COMPRISING A VARIABLE LIGHT SOURCE CONSISTING OF A DISCHARGE LAMP INCORPORATING AN ANODE AND A CATHODE BETWEEN WHICH A VARIABLE VOLTAGE IS APPLIED, SAID CATHODE BEING PARALLEL TO THE LONGITUDINAL AXIS OF THE LAMP, A PHOTOELECTRIC CELL DISPOSED IN FRONT OF SAID DISCHARGE LAMP, AND A SCREEN DISPOSED BETWEEN SAID DISCHARGE LAMP AND SAID PHOTOELECTRIC CELL, SAID SCREEN EXTENDING ALONG A CERTAIN LENGTH AND OVERLAPPING THE CATHODE END
References Cited (Backward Citations)
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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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |