US4009535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminated house number sign
Assignee: Cantrell Industries Inc
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Filing: 1975-10-01
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Granted: 1977-03-01
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Expires: 1995-10-01
Abstract
Abstract A self contained house number sign which charges an internal battery from photo-voltaic cells during daylight. The battery is connected to a lamp via a phototransistor for energizing the lamp at night. The lamp edge lights a plastic template having cutout house number indicia.
Inventors
- 👤 William Stock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:47
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0033; G02B6/0058; G02B6/006; G09; G09F; G09F13/00; G09F13/04; G09F13/06; G02B6/0035; G02B6/0036; Y; Y10; Y10S; Y10S116/00; Y10S116/36; Y10S136/00; Y10S136/291
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A self contained illuminated house number sign which stores solar energy in daylight and utilizes the stored energy for night illumination comprising photovoltaic cell means, battery means, photoconductive cell means for coupling said photovoltaic cell means to said battery means only during daylight, lamp means, light sensing means for coupling said battery means to said lamp means at night, sign means positioned to be illuminated by said lamp means, and wherein said light sensing means is a photo transistor.
Claim 2
Dependent Claim
79 words
A self contained illuminated house number sign which stores solar energy in daylight and utilizes the stored energy for night illumination comprising photovoltaic cell means, battery means, photoconductive cell means for coupling said photovoltaic cell means to said battery means only during daylight, lamp means, light sensing means for coupling said battery means to said lamp means at night, sign means positioned to be illuminated by said lamp means, and wherein said light sensing means is a photo transistor.
Claim 3
Dependent Claim
24 words
The sign of claim 1 wherein said sign means is a transluscent plastic template which is positioned to be edgelit by said lamp means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |