US3448667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light attenuation means
Assignee: GTE Sylvania Inc
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Filing: 1963-10-18
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Granted: 1969-06-10
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Harry E Smithgall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:22
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
AN OPTICAL SYSTEM FOR DISCRETELY EXPOSING THE FORAMINOUSLY MASKED LIGHT SENSITIVE SCREEN OF A COLOR CATHODE RAY TUBE COMPRISING: A SHUTTERED POINT LIGHT SOURCE DIRECTIONALLY ORIENTED RELATIVE TO SAID MASKED SCREEN TO PROVIDE ILLUMINATION THERETO; A LIGHT PERMEABLE REFRACTIVE MEDIUM HAVING A RELATED PLANOCONCAVE SURFACES PREDETERMINATELY DISPOSED INTERMEDIATE SAID SHUTTERED LIGHT SOURCE AND SAID MASKED SCREEN, SAID PLANO SURFACE BEING PROXIMAL TO SAID LIGHT SOURCE AND SAID CONCAVE SURFACE BEING PROXIMAL TO SAID SCREEN; AND
Claim 2
Dependent Claim
75 words
AN OPTICAL SYSTEM FOR DISCRETELY EXPOSING THE FORAMINOUSLY MASKED LIGHT SENSITIVE SCREEN OF A COLOR CATHODE RAY TUBE COMPRISING: A SHUTTERED POINT LIGHT SOURCE DIRECTIONALLY ORIENTED RELATIVE TO SAID MASKED SCREEN TO PROVIDE ILLUMINATION THERETO; A LIGHT PERMEABLE REFRACTIVE MEDIUM HAVING A RELATED PLANOCONCAVE SURFACES PREDETERMINATELY DISPOSED INTERMEDIATE SAID SHUTTERED LIGHT SOURCE AND SAID MASKED SCREEN, SAID PLANO SURFACE BEING PROXIMAL TO SAID LIGHT SOURCE AND SAID CONCAVE SURFACE BEING PROXIMAL TO SAID SCREEN; AND
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) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |