Patent US5638122A successfully refreshed from Google Patents.
Patent US3213515A successfully refreshed from Google Patents.
US3213515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for increasing light emission, stabilization and rejuvenation of electro-luminescent lamps and phosphors
Assignee: GTE Sylvania Inc
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Filing: 1961-02-06
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Granted: 1965-10-26
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Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Koury Frederic
- 👤 Fortucci Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:30
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
IN A PROCESS FOR THE STABILIZATION OF EMISSION AND EXTENSION OF LIFE OF AN EMBEDDED ELECTROLUMINESCENT PHOSPHOR, THE STEP WHICH COMPRISES, REHEATING SAID EMBEDDED PHOSPHOR TO A TEMPERATURE BETWEEN ABOUT 550*C. TO
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |