US3582701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color tube screen with light-absorbing cermet deposits
Assignee: Zenith Electronics LLC
•
Filing: 1969-03-27
•
Granted: 1971-06-01
•
Expires: 1989-03-27
Abstract
Abstract A shadow mask type of color picture tube has a mosaic screen comprised of dots of green, blue and red phosphors which are individually smaller in size than the apertures of the mask. These dots are surrounded by a deposit of a light-absorbing cermet for absorbing visible ambient light incident on the face of the tube and comprising a mixture of nickel and nickel oxide or aluminum and aluminum oxide. In processing such a screen, the metal is vacuum deposited in an atmosphere of water vapor to cover the entire screen area with a cermet film and thereafter portions of the film overlying elemental areas of the screen intended to receive deposits of phosphor material are removed by etching.
Inventors
- 👤 Nicholas Zeliotis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/327; H01J29/187; H01J29/322
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
23 words
A color cathode-ray picture tube in accordance with claim 1 in which said cermet film is a mixture of nickel and nickel oxide.
Claim 2
Dependent Claim
22 words
A color cathode-ray picture tube in accordance with claim 2 in which said film is covered by a protective layer of aluminum.
Claim 3
Dependent Claim
22 words
A color cathode-ray picture tube in accordance with claim 1 in which said film is a mixture of aluminum and aluminum oxide.
Claim 4
Dependent Claim
54 words
A color cathode-ray picture tube in accordance with claim 1 in which said elemental areas are circular; said phosphor deposits define dot triads on said screen individually including a dot of green, a dot of blue, and a dot of red phosphor; and in which said cermet film surrounds each of said phosphor deposits.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |