US2837429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing patterns
Assignee: GTE Sylvania Inc
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Filing: 1955-06-21
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Granted: 1958-06-03
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Expires: 1975-06-21
Abstract
No abstract record available.
Inventors
- 👤 Whiting William Elmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:25
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF FORMING A CATHODE RAY TUBE VIEWING PANEL HAVING A PHOSPHOR PATTERN FORMED THEREON COMPRISING THE STEPS OF COATING SAID PANEL WITH A LAYER OF A PHOSPHOR HAVING A GIVEN LIGHT EMISSIVITY AND LIGHT SENSITIZED POLYVINYL ALCOHOL, EXPOSING PREDETERMINED PORTIONS OF SAID LAYER TO LIGHT RAYS TO FORM THE PHOSPHOR PATTERN, WASHING SAID COATED PANEL WITH WATER TO DEVELOP THE PHOSPHOR PATTERN BY REMOVING MOST OF THE UNEXPOSED PORTIONS OF SAID LAYER, DEPOSITING A FILM OF POLYVINYL ALCOHOL UPON SAID COATED PANEL TO DISASSOCIATE SUBSTANTIALLY ALL OF THE REMAINDER OF SAID UNEXPOSED PORTIONS FROM SAID PANEL, DRYING SAID POLYVINYL ALCOHOL FILM, RINSING THE PANEL WITH WATER TO REMOVE SAID POLYVINYL ALCOHOL FILM AND SAID DIS-ASSOCIATED PORTIONS, AND REPEATING SAID STEPS TO FORM OTHER PHOSPHOR PATTERNS OF DIFFERENT LIGHT EMISSIVITY LATERALLY OFFSET FROM ONE ANOTHER.
Claim 2
Independent Claim
136 words
A METHOD OF FORMING A CATHODE RAY TUBE VIEWING PANEL HAVING A PHOSPHOR PATTERN FORMED THEREON COMPRISING THE STEPS OF COATING SAID PANEL WITH A LAYER OF A PHOSPHOR HAVING A GIVEN LIGHT EMISSIVITY AND LIGHT SENSITIZED POLYVINYL ALCOHOL, EXPOSING PREDETERMINED PORTIONS OF SAID LAYER TO LIGHT RAYS TO FORM THE PHOSPHOR PATTERN, WASHING SAID COATED PANEL WITH WATER TO DEVELOP THE PHOSPHOR PATTERN BY REMOVING MOST OF THE UNEXPOSED PORTIONS OF SAID LAYER, DEPOSITING A FILM OF POLYVINYL ALCOHOL UPON SAID COATED PANEL TO DISASSOCIATE SUBSTANTIALLY ALL OF THE REMAINDER OF SAID UNEXPOSED PORTIONS FROM SAID PANEL, DRYING SAID POLYVINYL ALCOHOL FILM, RINSING THE PANEL WITH WATER TO REMOVE SAID POLYVINYL ALCOHOL FILM AND SAID DIS-ASSOCIATED PORTIONS, AND REPEATING SAID STEPS TO FORM OTHER PHOSPHOR PATTERNS OF DIFFERENT LIGHT EMISSIVITY LATERALLY OFFSET FROM ONE ANOTHER.
References Cited (Backward Citations)
US2099297A
Cited
GB713908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |