US3269838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making luminescent screens for cathode ray tubes
Assignee: RCA Corp
•
Filing: 1963-03-18
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Granted: 1966-08-30
•
Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Saulnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:46
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/187; G; G03; G03F; G03F7/00; G03F7/004; G03F7/04; H01J29/22; H01J29/225; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF LAYING DOWN A MOSAIC PATTERN OF ELEMENTAL PHOSPHOR AREAS ON A FACEPLATE PANEL COMPRISING THE STEPS OF: (A) DEPOSITING ON SAID FACEPLATE PANEL A LAYER COMPRISING PHOSPHOR, POLYVINYL ALCOHOL, A PHOTOSENSITIZER, AND WATER IN WHICH THE WEIGHT RATIO OF POLYVINYL ALCOHOL/PHOSPHOR IS 0.09-0.17 AND THE POLYVINYL ALCOHOL HAS A MOLECULAR WEIGHT OF ABOUT 170,000-220,000, (B) DRYING SAID LAYER, (C) EXPOSING SAID DRIED LAYER TO A DESIRED PATTERN OF ACTINIC RAYS, AND (D) DEVELOPING THE EXPOSED LAYER TO REMOVE THE UNEXPOSED PORTIONS THEREOF.
Claim 2
Independent Claim
116 words
THE METHOD OF LAYING DOWN A MOSAIC PATTERN OF ELEMENTAL PHOSPHOR AREAS ON A FACEPLATE PANEL COMPRISING THE STEPS OF: (A) DEPOSITING ON SAID FACEPLATE PANEL A LAYER COMPRISING PHOSPHOR, POLYVINYL ALCOHOL, PHOTOSENSITIZER, NONDICHROMATIZABLE RESIN, AND WATER, IN WHICH THE SLURRY WEIGHT RATIO OF POLYVINYL ALCOHOL/PHOSPHOR IS 0.090.17 AND THE POLYVINYL ALCOHOL HAS A MOLECULAR WEIGHT OF 170,000-220,000, SAID NONDICHROMATIZABLE RESIN CONSISTING ESSENTIALLY OF AT LEAST ONE OF POLYVINYL ACETATE, ALKYL ACRYLATE AND ALKYL METHACRYLATE, AND WHEREIN THE WEIGHT RATIO OF RESIN/POLYVINYL ALCOHOL IS UP TO 3.0, (B) DRYING SAID LAYER, (C) EXPOSING SAID DRIED LAYER TO A DESIRED PATTERN OF ACTINIC RAYS, AND (D) THEREAFTER DEVELOPING THE SAID LAYER TO REMOVE THE UNEXPOSED PORTIONS THEREOF.
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |