US3282691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating cathode ray tube screen
Assignee: RCA Corp
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Filing: 1962-07-06
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Granted: 1966-11-01
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 Albert M Morrell
- 👤 Richard H Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:48
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/12; H03B7/14; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
THE METHOD OF LAYING DOWN A PATTERN OF PHOSPHOR DOTS BY A DIRECT PHOTOGRAPHIC PROCESS ON A SCREEN SUPPORT OF A CATHODE RAY TUBE HAVING A MULTI-APERTURED SHADOW MASK AND MEANS FOR PROJECTING AN ELECTRON BEAM ALONG ITS FIRST ORDER COLOR CENTER PATH AND THROUGH THE APERTURES OF SAID MASK AND ONTO SAID SCREEN SUPPORT, AND WHEREIN THE MAGNIFICATION OF THE TUBE VARIES FROM A MINIMUM AT THE CENTER OF THE SCREEN TO A MAXIMUM AT THE EDGE THEREOF, SAID METHOD COMPRISING: (A) DEPOSITING A PHOTOSENSITIVE COATING ON SAID SCREEN SUPPORT, (B) EXPOSING SAID COATING THROUGH THE APERTURES OF SAID MASK TO A SMALL AREA LIGHT SOURCE POSITIONED SUBSTANTIALLY AT A SECOND OR HIGHER ORDER COLOR CENTER OF SAID BEAM SO THAT LIGHT RAYS FROM SAID SOURCE WHICH PRINT A GIVEN PHOSPHOR DOT PASS THROUGH A DIFFERENT APERTURE THAN DOES THE ELECTRON BEAM WHICH EXCITES SAID GIVEN DOT, AND (C) DEVELOPING SAID EXPOSED COATING.
Claim 2
Independent Claim
154 words
THE METHOD OF LAYING DOWN A PATTERN OF PHOSPHOR DOTS BY A DIRECT PHOTOGRAPHIC PROCESS ON A SCREEN SUPPORT OF A CATHODE RAY TUBE HAVING A MULTI-APERTURED SHADOW MASK AND MEANS FOR PROJECTING AN ELECTRON BEAM ALONG ITS FIRST ORDER COLOR CENTER PATH AND THROUGH THE APERTURES OF SAID MASK AND ONTO SAID SCREEN SUPPORT, AND WHEREIN THE MAGNIFICATION OF THE TUBE VARIES FROM A MINIMUM AT THE CENTER OF THE SCREEN TO A MAXIMUM AT THE EDGE THEREOF, SAID METHOD COMPRISING: (A) DEPOSITING A PHOTOSENSITIVE COATING ON SAID SCREEN SUPPORT, (B) EXPOSING SAID COATING THROUGH THE APERTURES OF SAID MASK TO A SMALL AREA LIGHT SOURCE POSITIONED SUBSTANTIALLY AT A SECOND OR HIGHER ORDER COLOR CENTER OF SAID BEAM SO THAT LIGHT RAYS FROM SAID SOURCE WHICH PRINT A GIVEN PHOSPHOR DOT PASS THROUGH A DIFFERENT APERTURE THAN DOES THE ELECTRON BEAM WHICH EXCITES SAID GIVEN DOT, AND (C) DEVELOPING SAID EXPOSED COATING.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |