US3014813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent lamp
Assignee: GTE Sylvania Inc
•
Filing: 1957-06-04
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Granted: 1961-12-26
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Expires: 1977-06-04
Abstract
No abstract record available.
Inventors
- 👤 George H Bouchard
- 👤 Joseph A Dombrowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:12
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS OF COATING A BASE PIECE WITH AN ELECTROLUMINESCENT LAYER OF PREDETERMINED THICKNESS, SAID PROCESS COMPRISING: MIXING POWDERED ZINC SULFIDE PHOSPHOR PARTICLES OF FROM 10 TO 20 MICRONS SIZE AND POWDERED CERAMIC PARTICLES OF BETWEEN ONE-THIRD AND ONE-TENTH THE SIZE OF THE PHOSPHOR PARTICLES WITH A MIXTURE OF METHYL AND ISOPROPYL ALCOHOL, AND IMMERSING THE BASE PIECE IN IT FOR A TIME SUFFICIENT TO DEPOSIT ON IT A COATING OF PREDETERMINED THICKNESS.
Claim 2
Dependent Claim
73 words
THE PROCESS OF COATING A BASE PIECE WITH AN ELECTROLUMINESCENT LAYER OF PREDETERMINED THICKNESS, SAID PROCESS COMPRISING: MIXING POWDERED ZINC SULFIDE PHOSPHOR PARTICLES OF FROM 10 TO 20 MICRONS SIZE AND POWDERED CERAMIC PARTICLES OF BETWEEN ONE-THIRD AND ONE-TENTH THE SIZE OF THE PHOSPHOR PARTICLES WITH A MIXTURE OF METHYL AND ISOPROPYL ALCOHOL, AND IMMERSING THE BASE PIECE IN IT FOR A TIME SUFFICIENT TO DEPOSIT ON IT A COATING OF PREDETERMINED THICKNESS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |