Patent US2989595A successfully refreshed from Google Patents.
Patent US3449253A successfully refreshed from Google Patents.
US3449253A
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Piezoelectric composition and method of preparing the same
Assignee: Panasonic Holdings Corp
•
Filing: 1965-12-14
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Granted: 1969-06-10
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Expires: 1985-12-14
Abstract
No abstract record available.
Inventors
- 👤 Shigeru Hayakawa
- 👤 Hiromu Ouchi
- 👤 Kaneomi Nagase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/51; C04B35/01; C04B35/46; C04B35/48; C04B35/50; H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/093; H10N30/097; H10N30/80; H10N30/85; H10N30/853; H10N30/8548
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3179594A
Cited
US3268453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |