US2786925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal film resistor
Assignee: Sprague Electric Co
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Filing: 1952-12-31
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Granted: 1957-03-26
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Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 George J Kahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:05
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/14; H01C1/142; H01B; H01B1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A METAL FILM RESISTOR COMPRISING A VITREOUS BASE, AN ELECTRICALLY RESISTIVE FILM OF A METAL ALLOY UPON SAID BASE, TERMINALS CONNECTED TO SAID BASE BY MEANS OF FIREDON SILVER LAYERS, AND NARROW BANDS OF A METAL SELECTED FROM THE CLASS CONSISTING OF PLATINUM AND PALLADIUM CONNECTING SAID SILVER LAYERS WITH THE FILM SO AS TO COUNTERACT ANY TENDENCIES OF SAID SILVER LAYERS TO DIFFUSE INTO SAID RESISTANCE FILM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |