US3819972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel glass compositions and cathode-ray tubes made therefrom
Assignee: OI Glass Inc
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Filing: 1972-02-28
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Granted: 1974-06-25
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Expires: 1992-02-28
Abstract
Abstract Novel glass compositions containing strontium oxide are disclosed of enhanced chemical durability and working properties and x-ray absorbing capability. Cathode-ray tubes, in general, and color television tubes, in particular, may be formed from these glasses containing strontium oxide. These articles possess improved x-ray absorbing properties and increased resistance to adverse discoloration and browning of the glass.
Inventors
- 👤 R Sanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/863; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/095; C03C3/11; C03C3/112; C03C4/00; C03C4/08; C03C4/087; G; G21; G21K; G21K4/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
15 words
The cathode-ray tube as defined in claim 1, wherein the glass has the following composition:
Claim 2
Dependent Claim
15 words
The cathode-ray tube as defined in claim 1 wherein the glass has the following composition:
Claim 3
Dependent Claim
15 words
The cathode-ray tube as defined in claim 1 wherein the glass has the following composition:
Claim 4
Dependent Claim
15 words
The cathode-ray tube as defined in claim 1 wherein the glass has the following composition:
Claim 5
Dependent Claim
15 words
The cathode-ray tube as defined in claim 1 wherein the glass has the following composition:
Claim 6
Dependent Claim
15 words
The cathode-ray tube as defined in claim 1 wherein the glass has the following composition:
Claim 7
Dependent Claim
13 words
A glass composition capable of absorbing x-rays consisting essentially of the following compositions.
Claim 8
Dependent Claim
13 words
A glass composition as set forth in claim 8 having the following composition:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |