Patent US3489532A successfully refreshed from Google Patents.
US3489532A
Expired / Lapsed
US
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Sintered silicon carbide varistors
Assignee: Panasonic Holdings Corp
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Filing: 1968-08-30
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Granted: 1970-01-13
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Expires: 1988-08-30
Abstract
No abstract record available.
Inventors
- 👤 Takeshi Masuyama
- 👤 Yoshio Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C04B35/56; C04B35/565; H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/118; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2205308A
Cited
US2364108A
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US2601373A
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US3153636A
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US3205465A
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US3404031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |