Patent US3024454A successfully refreshed from Google Patents.
US3544866A
Expired / Lapsed
US
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Electronic drive circuitry for ultrasonic devices
Assignee: C&B Corp
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Filing: 1969-10-16
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Granted: 1970-12-01
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Expires: 1989-10-16
Abstract
No abstract record available.
Inventors
- 👤 Robert P Mcleroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:46
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B2201/00; B06B2201/50; B06B2201/58; B06B2201/70; B06B2201/76
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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |