US4065696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: OI Glass Inc
•
Filing: 1974-03-29
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Granted: 1977-12-27
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Expires: 1994-03-29
Abstract
Abstract A cathode-ray tube, such as a color television tube, formed from a glass containing up to 20 percent by weight of strontium oxide as an essential ingredient thereof, which tube has imparted thereto improved X-ray absorbing properties without any material increase in the X-ray and electron browning of the glass.
Inventors
- 👤 Bernard L. Steierman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:58
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/24; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/083; C03C3/085; C03C3/087; C03C3/102; C03C3/105; C03C4/00; C03C4/08; C03C4/087; H01J29/86; H01J29/863
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A cathode-ray tube comprising a glass funnel portion, a glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, said tube having the property of absorbing X-rays emitted from within the tube, at least one of said glass members being formed from a glass having as an essential ingredient an amount of yttrium oxide sufficient to impart to said glass member said property of absorbing said X-rays.
Claim 2
Dependent Claim
80 words
A cathode-ray tube comprising a glass funnel portion, a glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, said tube having the property of absorbing X-rays emitted from within the tube, at least one of said glass members being formed from a glass having as an essential ingredient an amount of yttrium oxide sufficient to impart to said glass member said property of absorbing said X-rays.
Claim 3
Dependent Claim
27 words
The cathode-ray tube as defined in claim 1 wherein the amount of yttrium oxide in said glass is up to about 10 weight percent of said glass.
Claim 4
Dependent Claim
29 words
The cathode-ray tube as defined in claim 1 wherein the amount of yttrium oxide in said glass is from about 1 to about 6 weight percent of said glass.
Claim 5
Dependent Claim
80 words
A cathode-ray tube comprising a glass funnel portion, glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, at least one of said glass members being formed from a soda-potash-barium or a soda-potash-lead-barium glass containing up to 10 weight percent Y 2 O 3 as an essential component for absorption of X-radiation emitted from within the tube in the range of wavelengths between about 0.5 and 0.7A.
Claim 6
Dependent Claim
80 words
A cathode-ray tube comprising a glass funnel portion, glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, at least one of said glass members being formed from a soda-potash-barium or a soda-potash-lead-barium glass containing up to 10 weight percent Y 2 O 3 as an essential component for absorption of X-radiation emitted from within the tube in the range of wavelengths between about 0.5 and 0.7A.
Claim 7
Dependent Claim
21 words
A cathode ray tube of claim 4 wherein said glass contains 1 to 6 weight percent Y 2 O 3 .
Claim 8
Dependent Claim
100 words
A cathode-ray tube comprising a glass funnel portion, glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, at least one of said glass members being formed from a soda-potash-barium or a soda-potash-lead-barium glass, said glass containing cerium oxide in an amount not exceeding 1 weight percent to protect against X-ray browning and also containing up to 10 weight percent Y 2 O 3 as an essential component for absorption of X-radiation emitted from within the tube in the range of wavelengths between about 0.5 and 0.7A.
Claim 9
Dependent Claim
100 words
A cathode-ray tube comprising a glass funnel portion, glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, at least one of said glass members being formed from a soda-potash-barium or a soda-potash-lead-barium glass, said glass containing cerium oxide in an amount not exceeding 1 weight percent to protect against X-ray browning and also containing up to 10 weight percent Y 2 O 3 as an essential component for absorption of X-radiation emitted from within the tube in the range of wavelengths between about 0.5 and 0.7A.
Claim 10
Dependent Claim
149 words
A cathode-ray tube comprising a glass funnel portion, a glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, said tube having the property of absorbing X-rays emitted from within the tube, at least one of said glass members being formed from a glass containing Y 2 O 3 and having the following components in the weight percentages indicated: ______________________________________
Components Weight Percent
______________________________________
SiO.sub.2 45 - 70
Na.sub.2 O 3 - 10
K.sub.2 O 5 - 15
Al.sub.2 O.sub.3 0 - 6
CaO 0 - 8
MgO 0 - 3
BaO 0 - 20
Y.sub.2 O.sub.3 up to 15
PbO 0 - 30
Li.sub.2 O 0 - 2
F.sub.2 0 - 2
MnO 0 - 2
TiO.sub.2 0 - 1
Sb.sub.2 O.sub.3 0 - 1
CeO.sub.2 0 - 1
Rare Earths 0 - 1
______________________________________
Claim 11
Dependent Claim
149 words
A cathode-ray tube comprising a glass funnel portion, a glass faceplate sealed thereto, a fluorescent screen on the inner surface of said faceplate, and an electron gun disposed within said sealed tube, said tube having the property of absorbing X-rays emitted from within the tube, at least one of said glass members being formed from a glass containing Y 2 O 3 and having the following components in the weight percentages indicated: ______________________________________
Components Weight Percent
______________________________________
SiO.sub.2 45 - 70
Na.sub.2 O 3 - 10
K.sub.2 O 5 - 15
Al.sub.2 O.sub.3 0 - 6
CaO 0 - 8
MgO 0 - 3
BaO 0 - 20
Y.sub.2 O.sub.3 up to 15
PbO 0 - 30
Li.sub.2 O 0 - 2
F.sub.2 0 - 2
MnO 0 - 2
TiO.sub.2 0 - 1
Sb.sub.2 O.sub.3 0 - 1
CeO.sub.2 0 - 1
Rare Earths 0 - 1
______________________________________
Claim 12
Dependent Claim
18 words
A cathode-ray tube of claim 7 wherein said glass contains 1.6 weight percent Y 2 O 3 .
Claim 13
Dependent Claim
99 words
A glass containing Y 2 O 3 for absorption of X-rays consisting essentially of the following components in the indicated weight percentages: ______________________________________
Component Weight Percent
______________________________________
SiO.sub.2 45 - 70
Na.sub.2 O 3 - 10
K.sub.2 O 5 - 15
Al.sub.2 O.sub.3 0 - 6
CaO 0 - 8
MgO 0 - 3
BaO 0 - 20
Y.sub.2 O.sub.3 up to 15
PbO 0 - 30
Li.sub.2 O 0 - 2
F.sub.2 0 - 2
MnO 0 - 2
TiO.sub.2 0 - 1
Sb.sub.2 O.sub.3 0 - 1
CeO.sub.2 0 - 1
Rare Earths 0 - 1
______________________________________
Claim 14
Dependent Claim
99 words
A glass containing Y 2 O 3 for absorption of X-rays consisting essentially of the following components in the indicated weight percentages: ______________________________________
Component Weight Percent
______________________________________
SiO.sub.2 45 - 70
Na.sub.2 O 3 - 10
K.sub.2 O 5 - 15
Al.sub.2 O.sub.3 0 - 6
CaO 0 - 8
MgO 0 - 3
BaO 0 - 20
Y.sub.2 O.sub.3 up to 15
PbO 0 - 30
Li.sub.2 O 0 - 2
F.sub.2 0 - 2
MnO 0 - 2
TiO.sub.2 0 - 1
Sb.sub.2 O.sub.3 0 - 1
CeO.sub.2 0 - 1
Rare Earths 0 - 1
______________________________________
References Cited (Backward Citations)
US3382393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-26 | 1981-06-27 | 1981-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-26 | 1985-06-27 | 1985-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-26 | 1989-06-27 | 1989-12-27 | $7700.00 | Window Closed / Lapsed |