US2769040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone housing
Assignee: Dictaphone Corp
•
Filing: 1951-03-15
•
Granted: 1956-10-30
•
Expires: 1971-03-15
Abstract
No abstract record available.
Inventors
- 👤 Mattia Alfred L Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:12
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/08; H04R1/083; H04M; H04M1/00; H04M1/02; H04M1/03; H04R1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1563586A
Cited
US2390488A
Cited
US2408474A
Cited
US2485278A
Cited
US2508581A
Cited
US2478783A
Cited
US2572547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |