Patent GB972772A successfully refreshed from Google Patents.
Patent US3143683A successfully refreshed from Google Patents.
US3143683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television tube with improved optical filter
Assignee: PPG Industries Inc
•
Filing: 1959-01-02
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Granted: 1964-08-04
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 James E Duncan
- 👤 John J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:50
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/863; C; C03; C03C; C03C1/00; C03C1/10; C03C14/00; C03C14/006; C03C3/00; C03C3/04; C03C3/076; C03C3/095; C03C4/00; C03C4/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A COLOR TELEVISION TUBE HAVING A FACE PLATE COMPOSED OF A SUBSTANTIALLY NEUTRAL COLORED, TRANSPARENT, LIME-SODASILICA GLASS FAVORING TRANSMISSION IN THE RED PORTION OF THE VISIBLE SPECTRUM AND ABSORPTION BETWEEN THE RED AND GREEN PORTIONS OF THE VISIBLE SPECTRUM INCLUDING AS ESSENTIAL INGREDIENTS IN THE FOLLOWING PROPORTIONS BY WEIGHT: 0.05 TO 0.4 PERCENT FE2O3, 0.3 TO 1.2 PERCENT ND2O3, 0.01 TO 0.05 PERCENT NIO, 0.002 TO 0.006 PERCENT CO0 AND 0.002 TO 0.02 PERCENT SE, AND HAVING A PLURALITY OF GROUPS OF BLUE, GREEN AND RED COLOR EMITTING PHOSPHORS SUPPORTED ON THE INSIDE SURFACE OF THE FACE PLATE.
Claim 2
Dependent Claim
98 words
A COLOR TELEVISION TUBE HAVING A FACE PLATE COMPOSED OF A SUBSTANTIALLY NEUTRAL COLORED, TRANSPARENT, LIME-SODASILICA GLASS FAVORING TRANSMISSION IN THE RED PORTION OF THE VISIBLE SPECTRUM AND ABSORPTION BETWEEN THE RED AND GREEN PORTIONS OF THE VISIBLE SPECTRUM INCLUDING AS ESSENTIAL INGREDIENTS IN THE FOLLOWING PROPORTIONS BY WEIGHT: 0.05 TO 0.4 PERCENT FE2O3, 0.3 TO 1.2 PERCENT ND2O3, 0.01 TO 0.05 PERCENT NIO, 0.002 TO 0.006 PERCENT CO0 AND 0.002 TO 0.02 PERCENT SE, AND HAVING A PLURALITY OF GROUPS OF BLUE, GREEN AND RED COLOR EMITTING PHOSPHORS SUPPORTED ON THE INSIDE SURFACE OF THE FACE PLATE.
References Cited (Backward Citations)
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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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |