US3788997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance material and electrical resistor made therefrom
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1971-12-17
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Granted: 1974-01-29
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Expires: 1991-12-17
Abstract
Abstract A RESISTANCE MATERIAL INCLUDING A MIXTURE OF A GLASS FRIT AND FINELY DIVIDED PARTICLES OF TANTALUM CARBIDE AND TITANIUM. THE RESISTANCE MATERIAL IS ADAPTED TO BE APPLIED TO AND FIRED 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
- 👤 G Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:13
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/065; H01C17/06506; H01C17/06513; H01C17/0652
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |