US3573529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Faceplate of thin-window recording tube having intermediate sheet of smaller refractive index than the face plate
Assignee: Panasonic Holdings Corp
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Filing: 1969-06-16
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Granted: 1971-04-06
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Expires: 1989-06-16
Abstract
Abstract An improved faceplate of a thin-window recording tube having an additional glass sheet interposed between the outermost glass sheet and fluorescent layer. The faceplate offers increased resolution due to minimized diffusion of the output luminescent light with the refractive index of the intermediate glass sheet smaller than that of the outermost glass sheet.
Inventors
- 👤 Kaoru Tomii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/28; H01J29/24; H01J29/86; H01J29/89; H01J2229/00; H01J2229/89; H01J2229/8913; H01J2229/8916
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
67 words
A faceplate of thin-window recording tube, comprising an outermost glass sheet, an intermediate glass sheet adhered to the inner face of said outermost glass sheet, the refractive index of the latter being smaller than that of the former, a fluorescent layer of phosphor material disposed on the inner face of said intermediate glass sheet, and an aluminized backing adhered to the inner face of said fluorescent layer.
Claim 2
Dependent Claim
67 words
A faceplate of thin-window recording tube, comprising an outermost glass sheet, an intermediate glass sheet adhered to the inner face of said outermost glass sheet, the refractive index of the latter being smaller than that of the former, a fluorescent layer of phosphor material disposed on the inner face of said intermediate glass sheet, and an aluminized backing adhered to the inner face of said fluorescent layer.
Claim 3
Dependent Claim
28 words
A faceplate according to claim 1, in which said intermediate glass sheet comprises a plurality of layers having refractive indices that decrease successively toward said outermost glass sheet.
Claim 4
Dependent Claim
56 words
A combination of a faceplate of thin-window recording tube comprising an outermost glass sheet, a fluorescent layer of phosphors and an aluminized backing adhered to said fluorescent layer, with an intermediate glass sheet which is interposed between said outermost glass sheet and fluorescent layer and which possesses a smaller refractive index than said outermost glass sheet.
Claim 5
Dependent Claim
56 words
A combination of a faceplate of thin-window recording tube comprising an outermost glass sheet, a fluorescent layer of phosphors and an aluminized backing adhered to said fluorescent layer, with an intermediate glass sheet which is interposed between said outermost glass sheet and fluorescent layer and which possesses a smaller refractive index than said outermost glass sheet.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |