US3518199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric ceramics
Assignee: NEC Corp
•
Filing: 1969-07-10
•
Granted: 1970-06-30
•
Expires: 1989-07-10
Abstract
No abstract record available.
Inventors
- 👤 Norio Tsubouchi
- 👤 Masao Takahashi
- 👤 Tomeji Ohno
- 👤 Tsuneo Akashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/50; C04B35/01; C04B35/46; C04B35/48; C04B35/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3403103A
Cited
US3425944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |