US3814629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a luminescent screen of a color television display tube
Assignee: US Philips Corp
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Filing: 1971-09-21
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Granted: 1974-06-04
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Expires: 1991-09-21
Abstract
Abstract A METHOD OF MANUFACTURING A LUMINESCENT SCREEN OF A CATHODE-RAY TUBE FOR DISPLAYING COLORED PICTURES. THE LUMINESCENT AREAS OF THE SCREEN ARE SEPARATED BY LIGHT ABSORBING AREAS. THE LUMINESCENT AREAS ARE APPLIED BY MEANS OF ANY METHOD PREVIOUS TO THE APPLICATION OF THE LIGHT ABSORBING AREAS WHICH ARE APPLIED BY MENS OF ELECTROSTATIC DEPOSITION. FOR THE ELECTROSTATIC DEPOSITION OF THE LIGHT ABSORBING AREAS A CONDUCTIVE LAYER AND A DIELECTRIC LAYER ARE FORMED IN THE INTERMEDIATE SPACES BETWEEN THE LUMINESCENT AREAS. THE LAYERS ARE FORMED BY MEANS OF RINSING WITH DILUTE, I.E., LOW VISCOSITY, SOLUTIONS BY WHICH THE FORMATION OF THE LAYERS ON THE LUMINESCENT AREAS IS IMPEDED.
Inventors
- 👤 N Hansen
- 👤 W Littmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; H01J29/327; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2276; H01J9/2278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |