US3040201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing electroluminescent phosphor and electroluminescent device
Assignee: Westinghouse Electric Corp
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Filing: 1960-03-03
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Granted: 1962-06-19
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Expires: 1980-03-03
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:45
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF PROCESSING ELECTROLUMINESCENT PHOSPHOR TO OBTAIN FOR A DEVICE INCORPORATING SUCH PROCESSED PHOPHOR PREDETERMINED BRIGHTNESS (L) VERSUS APPLIED VOLTAGE (V) OPERATING CHARACTERISTICES WHICH APPROXIMATE L$V4, WHICH METHOD COMPRISES: PREPARING ELECTROLUMNESCENT PHOSPHOR AS SEPARATE FRACTIONS HAVING RESPECTIVE PARTICLE DIAMETERS OF 3U, 10U, 20U AND 40U; AND MIXING TOGETHER THE PREPARED PHOSPHOR FRACTIONS IN AMOUNTS PROPORTIONAL TO THE FOLLOWING: 115,000 PARTS BY WEIGHT OF THE 3U FRACTION, 9,000 PARTS BY WEIGHT OF THE 10U FRACTION, 830 PARTS BY WEIGHT OF THE 20U FRACTION AND 500 PARTS BY WEIGHT OF THE 40U FRACTION.
Claim 2
Independent Claim
92 words
THE METHOD OF PROCESSING ELECTROLUMINESCENT PHOSPHOR TO OBTAIN FOR A DEVICE INCORPORATING SUCH PROCESSED PHOPHOR PREDETERMINED BRIGHTNESS (L) VERSUS APPLIED VOLTAGE (V) OPERATING CHARACTERISTICES WHICH APPROXIMATE L$V4, WHICH METHOD COMPRISES: PREPARING ELECTROLUMNESCENT PHOSPHOR AS SEPARATE FRACTIONS HAVING RESPECTIVE PARTICLE DIAMETERS OF 3U, 10U, 20U AND 40U; AND MIXING TOGETHER THE PREPARED PHOSPHOR FRACTIONS IN AMOUNTS PROPORTIONAL TO THE FOLLOWING: 115,000 PARTS BY WEIGHT OF THE 3U FRACTION, 9,000 PARTS BY WEIGHT OF THE 10U FRACTION, 830 PARTS BY WEIGHT OF THE 20U FRACTION AND 500 PARTS BY WEIGHT OF THE 40U FRACTION.
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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |