US3598763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manganese-modified zinc oxide voltage variable resistor
Assignee: Panasonic Holdings Corp
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Filing: 1969-10-30
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Granted: 1971-08-10
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Expires: 1989-10-30
Abstract
Abstract A VOLTAGE VARIABLE RESISTOR CERAMIC COMPOSITION CONSISTING ESSENTIALLY OF ZINC OXIDE AND, AS AN ADDITIVE, MANGANESE OXIDE. THE MANGANESE-MODIFIED ZINC OXIDE VOLTAGE VARIABLE RESISTOR HAS IMPROVED VOLTAGE NONLINEAR PROPERTIES DUE TO THE FURTHER ADDITION OF BARIUM OXIDE, STRONTIUM OXIDE, LEAD OXIDE, URANIUM OXIDE, COBALT OXIDE, BISMUTH OXIDE AND CALCIUM OXIDE.
Inventors
- 👤 Michio Matsuoka
- 👤 Takeshi Masuyama
- 👤 Yoshio Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:51
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112; C; C04; C04B; C04B35/00; C04B35/01
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |