US2005425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative sound recording device
Assignee: Individual
•
Filing: 1931-02-03
•
Granted: 1935-06-18
•
Expires: 1951-02-03
Abstract
No abstract record available.
Inventors
- 👤 Kwartin Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:51
CPC Classifications
G; G11; G11B; G11B7/00
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) | 1938-06-17 | 1938-12-17 | 1939-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-06-17 | 1942-12-17 | 1943-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-06-17 | 1946-12-17 | 1947-06-18 | $7700.00 | Window Closed / Lapsed |