US2769867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectrostrictive signal and energy transducers
Assignee: Sonotone Corp
•
Filing: 1947-09-09
•
Granted: 1956-11-06
•
Expires: 1967-09-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Crownover
- 👤 Heiman W Koren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:43
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026; Y; Y10; Y10S; Y10S73/00; Y10S73/04; Y10S84/00; Y10S84/24; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |