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US2806155A
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Piezoelectric crystal traveling-wave transducers
Assignee: Individual
•
Filing: 1952-07-09
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Granted: 1957-09-10
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Expires: 1972-07-09
Abstract
No abstract record available.
Inventors
- 👤 Rotkin Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:56
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/18; H03F1/20; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1629100A
Cited
US1955471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |