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US3469211A
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Oscillatory circuit for electro-acoustic converter with starting means
Assignee: Branson Ultrasonics Corp
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Filing: 1967-10-16
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Granted: 1969-09-23
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Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 Andrew Shoh
- 👤 Hans Joachim Wilkens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:50
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3100886A
Cited
US3256497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |