Patent US3474267A successfully refreshed from Google Patents.
US3474267A
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US
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Piezoelectric transducer
Assignee: United States Department of the Navy
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Filing: 1967-06-23
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Granted: 1969-10-21
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Expires: 1987-06-23
Abstract
No abstract record available.
Inventors
- 👤 Stephen R Colberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:31
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; B06B1/0618; B06B1/08; H; H03; H03H; H03H9/00; H03H9/02; H03H9/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2573168A
Cited
US2806328A
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US2825808A
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US3024428A
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US3218488A
Cited
US3394274A
Cited
US3368085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |