US3967153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp having electrically conductive coating and a protective coating therefor
Assignee: GTE Sylvania Inc
•
Filing: 1974-11-25
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Granted: 1976-06-29
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Expires: 1994-11-25
Abstract
Abstract A fluorescent lamp has a transparent electrically conductive coating on the inner surface of the fluorescent lamp bulb. A transparent protective coating of finely powdered aluminum oxide is disposed on the conductive coating.
Inventors
- 👤 Howard W. Milke
- 👤 Tadius T. Sadoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:27
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; H01J61/54; H01J61/545
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
53 words
A fluorescent lamp comprising a glass envelope having electrodes at each end thereof, a transparent electrically conductive layer coated on the inner surface of the glass envelope, a transparent layer of finely powdered aluminum oxide coated on the electrically conductive coating and a layer of luminescent material coated on the aluminum oxide layer.
Claim 2
Dependent Claim
53 words
A fluorescent lamp comprising a glass envelope having electrodes at each end thereof, a transparent electrically conductive layer coated on the inner surface of the glass envelope, a transparent layer of finely powdered aluminum oxide coated on the electrically conductive coating and a layer of luminescent material coated on the aluminum oxide layer.
Claim 3
Dependent Claim
16 words
The lamp of claim 1 wherein the electrically conductive layer comprises tin oxide or indium oxide.
Claim 4
Dependent Claim
15 words
The lamp of claim 1 wherein the aluminum oxide layer is about 500 nanometers thick.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |