US2785331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of making color-phosphor screens
Assignee: RCA Corp
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Filing: 1953-08-24
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Granted: 1957-03-12
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Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Donahue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:14
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2277
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A COLOR-TELEVISION SCREEN COMPRISING A SCREEN-PLATE HAVING A MULTIPLICITY OF SYSTEMATICALLY ARRANGED, SUBSTANTIALLY DUPLICATE GROUPS OF SUB-ELEMENTAL AREAS OF DIFFERENT PRIMARY COLOR-RESPONSE CHARACTERISTICS ON A TARGET SURFACE THEREOF, SAID SUB-ELEMENTAL AREAS BEING CONSTITUTED OF GREEN, BLUE AND RED PHOSPHOR MATERIALS OF RESPECTIVELY DIFFERENT PARTICLE SIZES OF A RELATIVE ORDER CORRESPONDING TO THE INVERSE ORDER OF MAXIMUM SENSITIVITY OF THE HUMAN EYE TO SAID PRIMARY COLORS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |