US3521090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric transducer with electrically conductive mounting rods
Assignee: United States Department of the Navy
•
Filing: 1968-03-15
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Granted: 1970-07-21
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Expires: 1988-03-15
Abstract
No abstract record available.
Inventors
- 👤 Wesley L Angeloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:29
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; H; H10; H10N; H10N30/00; H10N30/01; H10N30/05; H10N30/057; H10N30/06; H10N30/063; H10N30/50; H10N30/503; H10N30/505; H10N30/80; H10N30/87; H10N30/871; H10N30/872
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2636134A
Cited
US2771663A
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US3075098A
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US3179826A
Cited
US3281612A
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US3390287A
Cited
US3378704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |