Patent US5217024A successfully refreshed from Google Patents.
US3758705A
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Coaxially conducting element and process for manufacture
Assignee: OI Glass Inc
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Filing: 1972-09-14
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Granted: 1973-09-11
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Expires: 1992-09-14
Abstract
Abstract Disclosed is a method for forming an array of conductive crystalline dendrites of reduced rutile in a glass-ceramic insulating matrix by crystallizing certain compositions containing titania and silica in a non-oxidizing atmosphere under the influence of a thermal gradient to form a parallel array of conductive reduced rutile dendrites.
Inventors
- 👤 A Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:45
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/02; H01J31/06; H01J31/065; C; C03; C03C; C03C10/00; C03C10/0009; C03C10/0036; H01B; H01B1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
30 words
The method of claim 1 further including the steps of exposing terminal points of individual conductive dendrites on the surface of said matrix to establish electrical conductivity through said dendrites.
Claim 2
Dependent Claim
15 words
The method of claim 1 wherein a reducing agent is present in said molten mass.
Claim 3
Dependent Claim
14 words
The method of claim 3 wherein said reducing agent is carbon or a metal.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said crystallizable composition consists essentially of: SiO2 25-50% by weight TiO2 20-40% MgO 10-25% Al2O3 0-30% B2O3 0-10%
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said crystallizable composition consists essentially of: SiO2 30-60% TiO2 10-35 CaO 10- 30 Al2O3 0-30 B2O3 0-30
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein the resulting matrix is a glass ceramic.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein the resulting matrix is glassy.
Claim 8
Dependent Claim
54 words
An electrically conductive element comprising a coaxial array of discrete, conductive, crystalline dendrites of reduced rutile in an insulating matrix, said reduced rutile being represented by the structural formula TixO2x 1 wherein x is an integer of at least one, said dendrites having been formed by in-situ crystallization and growth in said insulating matrix.
Claim 9
Dependent Claim
18 words
The element of claim 9 wherein the distribution of dendrites is at least about 50,000 per square inch.
Claim 10
Dependent Claim
22 words
The element of claim 9 wherein the diameter of said dendrites are in the range of about 0.1 to about 1.5 mil.
Claim 11
Dependent Claim
25 words
The element of claim 9 wherein the resistance of said dendrites is in the range of about 300 to about 1,000 ohms per linear inch.
Claim 12
Dependent Claim
17 words
The element of claim 9 wherein the resistivity of the matrix is at least about 1010 ohm-cm.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |