Patent US3615758A successfully refreshed from Google Patents.
US3615758A
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US
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Devitrifiable glasses and to glass-ceramics
Assignee: English Electric Co Ltd
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Filing: 1968-06-12
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Granted: 1971-10-26
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Expires: 1988-06-12
Abstract
Abstract Devitrifiable glasses and refractory glass-ceramics, especially suitable for use as insulating coatings on thin wires, contain P205 together with ZnO or BaO or both. MgO may be present if ZnO is present and a nucleating agent is included.
Inventors
- 👤 Peter William Mcmillan
- 👤 Brian Purdam Hodgson
- 👤 Douglas Stanley Crozier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:21
CPC Classifications
C; C03; C03C; C03C10/00; C03C3/00; C03C3/12; C03C3/16; H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
21 words
A refractory glass-ceramic material according to claim 1, wherein the major constituents are, in percentages by weight: P2O5 45-55% ZnO 39-45%
Claim 2
Dependent Claim
22 words
A refractory glass-ceramic material according to claim 1, wherein the major constituenTs are, in percentages by weight: P2O5 44-50% ZnO 8-40%BaO 5-37%
Claim 3
Dependent Claim
23 words
A refractory glass-ceramic material according to claim 1, wherein the major constituents are, in percentages by weight: P2O5 50-60% ZnO 20-29% MgO 5-9%
Claim 4
Dependent Claim
25 words
A refractory glass-ceramic material according to claim 1, wherein the major constituents are, in percentages by weight: P2O5 50-54% ZnO 21-23% BaO 8-15% MgO 1-4%
Claim 5
Dependent Claim
32 words
A refractory glass-ceramic material according to claim 1, wherein the major constituents are, in percentages by weight: P2O5 40% BaO 50% and the composition also includes 5 percent by weight of A12O3.
Claim 6
Dependent Claim
22 words
A refractory glass-ceramic material according to claim 1, wherein the nucleating agent is Pt in the proportion of 0.005-0.05 percent by weight.
Claim 7
Dependent Claim
22 words
A refractory glass-ceramic material according to claim 1, wherein the nucleating agent is ZrO2 in the proportion of 0.5-2 percent by weight.
Claim 8
Dependent Claim
22 words
A refractory glass-ceramic material according to claim 1, wherein the nucleating agent is Au in the proportion of 0.01-0.03 percent by weight.
Claim 9
Dependent Claim
40 words
A refractory glass-ceramic material according to claim 1, including also the following minor constituents, in percentages by weight: A12O 0-8% SiO20-7% B2O3 0-5% the total of the minor constituents other than the nucleating agent not exceeding 15 percent by weight.
References Cited (Backward Citations)
US2943059A
Cited
US3113033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |