US5669381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical overstress pulse protection
Assignee: Littelfuse Inc
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Filing: 1990-11-14
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Granted: 1997-09-23
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Expires: 2010-11-14
Abstract
Abstract An electrical overstress composite of conductor/semicondcutor particles including particles in the 100 micron range, micron range, and submicron range, distributed in a densely packed homogeneous manner, a minimum proportion of 100 angstrom range insulative particles separating the conductor/semiconductor particles, and a minimum proportion of insulative binder matrix sufficient to combine said particles into a stable coherent body.
Inventors
- 👤 Hugh M. Hyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:12
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/12; H01C7/105; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A material for placement between and in contact with spaced conductors to provide a non-linear resistance therebetween, said material comprising a matrix formed of a binder and only closely spaced conductive particles: (a) said closely spaced conductive particles being homogeneously distributed, said particles being in the submicron range to hundred micron range in size and spaced by said binder to provide electrical conduction by quantum-mechanical tunneling therebetween; and (b) said binder selected to provide the quantum-mechanical tunneling media between said conductive particles and predetermined resistance between said conductive particles in the absence of quantum-mechanical tunneling.
Claim 2
Dependent Claim
95 words
A material for placement between and in contact with spaced conductors to provide a non-linear resistance therebetween, said material comprising a matrix formed of a binder and only closely spaced conductive particles: (a) said closely spaced conductive particles being homogeneously distributed, said particles being in the submicron range to hundred micron range in size and spaced by said binder to provide electrical conduction by quantum-mechanical tunneling therebetween; and (b) said binder selected to provide the quantum-mechanical tunneling media between said conductive particles and predetermined resistance between said conductive particles in the absence of quantum-mechanical tunneling.
Claim 3
Dependent Claim
24 words
A material as set forth in claim 1, wherein said spacing of said particles is in the range of about 20 to 200 angstroms.
Claim 4
Dependent Claim
14 words
A material as set forth in claim 2, and further including fumed silicon dioxide.
Claim 5
Dependent Claim
14 words
A material as set forth in claim 1, and further including fumed silicon dioxide.
Claim 6
Dependent Claim
19 words
A device utilizing materials as set forth in claim 1, to provide nanosecond transient overvoltage protection to electronic circuitry.
Claim 7
Dependent Claim
13 words
A material as set forth in claim 1, and further including powdered semiconductors.
Claim 8
Dependent Claim
13 words
A material as set forth in claim 2, and further including powdered semiconductors.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-22 | 2001-03-24 | 2001-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-22 | 2005-03-24 | 2005-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-22 | 2009-03-24 | 2009-09-23 | $7700.00 | Window Closed / Lapsed |