Patent US3794518A successfully refreshed from Google Patents.
US3794518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistance material and method of making the same
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1972-05-01
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Granted: 1974-02-26
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Expires: 1992-05-01
Abstract
Abstract AN ELECTRICAL RESISTANCE MATERIAL COMPRISING A MIXTURE OF A GLASS FRIT AND FINELY DIVIDED PARTICLES OF AN ALLOY OF COPPER AND NICKEL. THE RESISTANCE MATERIAL MAY ALSO INCLUDE FINELY DIVIDED PARTICLES OF AN ADDITIONAL METAL HAVING A POSITIVE TEMPERATURE COEFFICIENT OF RESISTANCE AND WHICH MAY READILY OXIDIZE AT HIGH TEMPERATURES. THE RESISTANCE MATERIAL IS ADAPTED TO BE APPLIED TO AND FIXED ON A SUBSTRATE TO FORM AN ELECTRICAL RESISTOR WHICH WILL READILY FUSE OR OPEN WHEN SUBJECTED TO AN OVERLOAD TO PREVENT EXCESSIVE OVERHEATING OF THE RESISTOR.
Inventors
- 👤 R Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:11
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/06526
Claims Analysis
Total Claims: 0
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |