US2088324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magneto-strictive electromechanical sound device
Assignee: ELAC Electroacustic GmbH
•
Filing: 1935-05-22
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Granted: 1937-07-27
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Expires: 1955-05-22
Abstract
No abstract record available.
Inventors
- 👤 John Ulrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:51
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/08; Y; Y10; Y10S; Y10S116/00; Y10S116/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-07-26 | 1941-01-25 | 1941-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-26 | 1945-01-25 | 1945-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-26 | 1949-01-25 | 1949-07-27 | $7700.00 | Window Closed / Lapsed |