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US3462730A
Expired / Lapsed
US
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Transducer of acoustical energy exhibiting the characteristics of a pulsating sphere
Assignee: United States Department of the Navy
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Filing: 1968-03-11
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Granted: 1969-08-19
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Wesley L Angeloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:23
CPC Classifications
H; H04; H04R; H04R17/00; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611; H04R1/00; H04R1/20; H04R1/32; H04R1/40; H04R1/403
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |