US3561847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic electroresponsive light regulator utilizing taut band meter movement
Assignee: AT&T Inc
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Filing: 1968-06-05
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Granted: 1971-02-09
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Expires: 1988-06-05
Abstract
Abstract AN ELECTRORESPONSIVE LIGHT REGULATING DEVICE IS CONSTRUCTED WITH A PAIR OF LIGHT CONTROLLING ELEMENTS SUCH AS FILTERS OR IRIS BLADES MOUNTED ON A PAIR OF CANTILEVER SPRING MEMBERS. THE CANTILEVER SPRINGS ARE CONNECTED TOGETHER BY A TAUT BAND AND A METER MOVEMENT IS POSITIONED TO ENGAGE AND DISPLACE THE TAUT BAND AND THUS ALTER THE RELATION OF THE LIGHT CONTROLLING ELEMENTS.
Inventors
- 👤 Sotirios C Kitsopoulos
- 👤 Rembert R Stokes
- 👤 Werner Thommen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:51
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |