US3995192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reprographic fluorescent lamp with improved reflector layer
Assignee: General Electric Co
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Filing: 1975-12-05
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Granted: 1976-11-30
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Expires: 1995-12-05
Abstract
Abstract An improved reflector layer is provided utilizing a titanium dioxide (TiO 2 ) admixture containing up to approximately 15 percent by weight alumina (Al 2 O 3 ) or zirconia (ZrO 2 ). Said reflector layer underlies the phosphor layer, and an aluminum oxide (Al 2 O 3 ) layer can be deposited upon the phosphor layer.
Inventors
- 👤 Edward E. Hammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:48
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
An aperture fluorescent reprographic lamp comprising an elongated envelope containing an ionizable medium including mercury vapor and having electrodes at the respective ends thereof, and a phosphor layer deposited upon a reflector layer within said envelope, the improvement wherein said reflector layer comprises a TiO 2 admixture containing from a small but effective amount up to approximately 15 percent by weight of an additive oxide compound selected from Al 2 O 3 and ZrO 2 .
Claim 2
Dependent Claim
76 words
An aperture fluorescent reprographic lamp comprising an elongated envelope containing an ionizable medium including mercury vapor and having electrodes at the respective ends thereof, and a phosphor layer deposited upon a reflector layer within said envelope, the improvement wherein said reflector layer comprises a TiO 2 admixture containing from a small but effective amount up to approximately 15 percent by weight of an additive oxide compound selected from Al 2 O 3 and ZrO 2 .
Claim 3
Dependent Claim
16 words
A lamp as in claim 1 wherein the phosphor composition is a green zinc silicate phosphor.
Claim 4
Dependent Claim
30 words
A lamp as in claim 2 wherein the phosphor composition is a green zinc silicate phosphor admixture containing up to approximately 0.4 percent by weight Sb 2 O 3 .
Claim 5
Dependent Claim
16 words
A lamp as in claim 1 wherein the phosphor composition is a green magnesium gallate phosphor.
Claim 6
Dependent Claim
16 words
A lamp as in claim 1 wherein the phosphor compostion is a cool white halophosphate phosphor.
Claim 7
Dependent Claim
18 words
A lamp as in claim 1 which further includes an aluminum oxide layer deposited upon the phosphor layer.
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) | 1979-11-30 | 1980-05-31 | 1980-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-30 | 1984-05-31 | 1984-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-30 | 1988-05-31 | 1988-11-30 | $7700.00 | Window Closed / Lapsed |