US3424914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric lighting control device utilizing translucent film with reflective areas
Assignee: Individual
•
Filing: 1966-04-20
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Granted: 1969-01-28
•
Expires: 1986-04-20
Abstract
No abstract record available.
Inventors
- 👤 John L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:45
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/12; G05B19/124; F; F21; F21W; F21W2131/00; F21W2131/40; F21W2131/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A LIGHTING CONTROL DEVICE COMPRISING A FRAME HAVING A TOP SURFACE THEREON, APERTURE MEANS LOCATED IN SAID SURFACE, TRANSLUCENT FILM MEANS ADAPTED TO BE PROVIDED ON THE UPPER SURFACE THEREOF WITH A REFLECTIVE MATERIAL, MEANS FOR MOVING SAID FILM MEANS OVER SAID APERTURE MEANS, PHOTOCELL MEANS MOUNTED ON SAID FRAME ADJACENT TO AND BENEATH SAID SURFACE AT THE APERTURE MEANS, LIGHT SOURCE MEANS LOCATED BENEATH SAID SURFACE ADJACENT SAID APERTURE MEANS AND ADAPTED TO DIRECT LIGHT UPWARDLY THROUGH SAID APERTURE MEANS AND SAID TRANSLUCENT FILM MEANS, BAFFLE MEANS SUBSTANTIALLY SURROUNDING SAID PHOTOCELL
Claim 2
Dependent Claim
92 words
A LIGHTING CONTROL DEVICE COMPRISING A FRAME HAVING A TOP SURFACE THEREON, APERTURE MEANS LOCATED IN SAID SURFACE, TRANSLUCENT FILM MEANS ADAPTED TO BE PROVIDED ON THE UPPER SURFACE THEREOF WITH A REFLECTIVE MATERIAL, MEANS FOR MOVING SAID FILM MEANS OVER SAID APERTURE MEANS, PHOTOCELL MEANS MOUNTED ON SAID FRAME ADJACENT TO AND BENEATH SAID SURFACE AT THE APERTURE MEANS, LIGHT SOURCE MEANS LOCATED BENEATH SAID SURFACE ADJACENT SAID APERTURE MEANS AND ADAPTED TO DIRECT LIGHT UPWARDLY THROUGH SAID APERTURE MEANS AND SAID TRANSLUCENT FILM MEANS, BAFFLE MEANS SUBSTANTIALLY SURROUNDING SAID PHOTOCELL
References Cited (Backward Citations)
US2994804A
Cited
USRE25258E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |