US3330682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a cathode ray tube
Assignee: Sony Corp
•
Filing: 1963-11-06
•
Granted: 1967-07-11
•
Expires: 1983-11-06
Abstract
No abstract record available.
Inventors
- 👤 Tamura Michio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:27
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2275; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/187; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN THE MANUFACTURE OF A COLOR SCREEN FOR A GLASS CATHODE RAY TUBE HAVING A REGULAR ARRANGEMENT OF COLOR PHOSPHORS INTERSPERSED WITH A REGULAR ARRANGEMENT OF GUARD AREAS, THE IMPROVEMENT WHICH COMPRISES DEPOSITING A SENSITIZED ELECTRON HARDENABLE LAYER OVER THE FACE OF SAID TUBE, IMPINGING ELECTRON BEAMS IN A PREDETERMINED PATTERN ON THE RESULTING LAYER, DEVELOPING THE EXPOSED LAYER BY TREATMENT WITH A SOLVENT FOR THE UNEXPOSED AREAS TO LEAVE A REGULAR ARRANGEMENT OF UNDISSOLVED AREAS AND BARE AREAS THEREBETWEEN, TREATING THOSE OF THE AREAS IN WHICH THE GUARD AREAS ARE TO APPEAR WITH A SALT OF A METAL CAPABLE OF REACTING WITH THE ALKALI METAL CONSTITUTENTS OF THE GLASS TO FORM A NON-LUMINESCENT, OPAQUE REACTION PRODUCT, HEAT-
Claim 2
Dependent Claim
118 words
IN THE MANUFACTURE OF A COLOR SCREEN FOR A GLASS CATHODE RAY TUBE HAVING A REGULAR ARRANGEMENT OF COLOR PHOSPHORS INTERSPERSED WITH A REGULAR ARRANGEMENT OF GUARD AREAS, THE IMPROVEMENT WHICH COMPRISES DEPOSITING A SENSITIZED ELECTRON HARDENABLE LAYER OVER THE FACE OF SAID TUBE, IMPINGING ELECTRON BEAMS IN A PREDETERMINED PATTERN ON THE RESULTING LAYER, DEVELOPING THE EXPOSED LAYER BY TREATMENT WITH A SOLVENT FOR THE UNEXPOSED AREAS TO LEAVE A REGULAR ARRANGEMENT OF UNDISSOLVED AREAS AND BARE AREAS THEREBETWEEN, TREATING THOSE OF THE AREAS IN WHICH THE GUARD AREAS ARE TO APPEAR WITH A SALT OF A METAL CAPABLE OF REACTING WITH THE ALKALI METAL CONSTITUTENTS OF THE GLASS TO FORM A NON-LUMINESCENT, OPAQUE REACTION PRODUCT, HEAT-
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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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |