US2485405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dipole microphone
Assignee: Stromberg Carlson Corp
•
Filing: 1944-04-21
•
Granted: 1949-10-18
•
Expires: 1964-04-21
Abstract
No abstract record available.
Inventors
- 👤 Olney Benjamin
- 👤 Frank H Slaymaker
- 👤 Willard F Meeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:03
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/342
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2200097A
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US2210415A
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US2299620A
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US2228886A
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US2352305A
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US2346395A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |