US2866009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recording and sound reproducing apparatus
Assignee: PROTONA
•
Filing: 1951-12-28
•
Granted: 1958-12-23
•
Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Genning Ernst
- 👤 Draheim Willi
- 👤 Monske Nikolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
G; G11; G11B; G11B5/00; G11B2005/0002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US597782A
Cited
US1237496A
Cited
GB567152A
Cited
US2369017A
Cited
US2515190A
Cited
US2467507A
Cited
US2616982A
Cited
US2481004A
Cited
US2609457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |