Patent US3424686A successfully refreshed from Google Patents.
US3424686A
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Piezoelectric ceramic materials
Assignee: Panasonic Holdings Corp
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Filing: 1965-10-23
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Granted: 1969-01-28
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Hiromu Ouchi
- 👤 Masamitsu Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49; C04B35/491; C04B35/493; C04B35/495; C04B35/497; C04B35/499; H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3213; C04B2235/3215; C04B2235/3231; C04B2235/3232; C04B2235/3234; C04B2235/3244; C04B2235/3248; C04B2235/3251; C04B2235/3255; C04B2235/65; C04B2235/656; C04B2235/70; C04B2235/74; C04B2235/76; C04B2235/768
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3068177A
Cited
US3268453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |