US3795048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing non-linear resistors
Assignee: Mitsubishi Mining and Cement Co Ltd
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Filing: 1973-01-26
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Granted: 1974-03-05
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Expires: 1993-01-26
Abstract
Abstract A method for manufacturing non-linear resistors comprising superposing several sintered wafers and applying silver electrodes to opposite surfaces of the sintered wafers superposed respectively is disclosed. The sintered wafer, consisting essentially of iron oxide and copper oxide has negative resistance and also possesses such thermister constant B*K and specific resistance R0 K Omega at 273* K as satisfy the relation B X R0 < OR = 104K Omega .*K. The non-linear resistors manufactured by this method, based on utilization of the property of the contact surfaces between the sintered wafers superposed, have remarkably stable volt-ampere characteristics and are inexpensive in cost.
Inventors
- 👤 K Tachibana
- 👤 M Nishioka
- 👤 M Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:48
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
31 words
A method for manufacturing a non-linear resistor as described in claim 1, wherein said sintered wafers comprise 66*34 percent of iron oxide (Fe2O3) and 34*66 mol percent of copper oxide (CuO).
References Cited (Backward Citations)
US2720573A
Cited
US3124772A
Cited
US3343114A
Cited
FR1446249A
Cited
US3503029A
Cited
US3689863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |