Patent US3703401A successfully refreshed from Google Patents.
US3703401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing the viewing-screen structure of a cathode-ray tube
Assignee: RCA Licensing Corp
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Filing: 1970-12-28
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Granted: 1972-11-21
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Expires: 1990-12-28
Abstract
Abstract METHOD COMPRISES (A) PREHEATING TO ABOUT 50 TO 75* C. A VIEWING-SCREEN SUPPORT, A VIEWING SCREEN THEREON AND A LIGHT-RELFECTIVE METAL LAYER ON THE SCREEN, (B) DEPOSITING ON THE PREHEATED METAL LAYER A COATING OF AN ORGANIC, VOLATILIZABLE FILM-FORMING MATERIAL FROM AN AQUEOUS DISPERSION THEREOF, AND (C) DEPOSITION ON THE COATED PREHEATED METAL LAYER AN OVERCOATING OF CARBON PARTICLES FROM A BINDER-FREE SUSPENSION OF CARBON PARTICLES IN A LIQUID. THEN, THE SUPPORT AND STRUCTURES THEREON ARE BAKED IN AIR AT ABOUT 400 TO 450*C. TO REMOVE ORGANIC AND VOLATILE MATTER.
Inventors
- 👤 Samuel Broughton Deal
- 👤 Donald Walter Bartch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:43
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |