US2576250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound recorder
Assignee: Dictaphone Corp
•
Filing: 1944-08-26
•
Granted: 1951-11-27
•
Expires: 1964-08-26
Abstract
No abstract record available.
Inventors
- 👤 George P Brubaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:36
CPC Classifications
G; G11; G11B; G11B3/00; G11B19/00; G11B19/20; G11B19/26; G11B19/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US803556A
Cited
US1381354A
Cited
FR575290A
Cited
GB271810A
Cited
US2074139A
Cited
US2157158A
Cited
DE698128C
Cited
US2254844A
Cited
US2328703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |