Patent US4249232A successfully refreshed from Google Patents.
Patent US3528918A successfully refreshed from Google Patents.
US3528918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric ceramic compositions
Assignee: Panasonic Holdings Corp
•
Filing: 1968-09-12
•
Granted: 1970-09-15
•
Expires: 1988-09-12
Abstract
No abstract record available.
Inventors
- 👤 Masamitsu Nishida
- 👤 Hiromu Ouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:05
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C04B35/51
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3268453A
Cited
US3403103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |