US2901550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recording and reproducing devices
Assignee: Umicore NV SA
•
Filing: 1957-06-19
•
Granted: 1959-08-25
•
Expires: 1977-06-19
Abstract
No abstract record available.
Inventors
- 👤 Eudore Brasseur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:50
CPC Classifications
G; G11; G11B; G11B25/00; G11B25/04; G11B15/00; G11B15/18; G11B15/26; G11B15/34; G11B23/00; G11B23/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US849484A
Cited
US1765898A
Cited
US2030400A
Cited
US2249029A
Cited
US2492435A
Cited
US2648589A
Cited
US2776569A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |